diff --git a/src/Internal/Api/All.elm b/src/Internal/Api/All.elm
index 0c97add..bc2f369 100644
--- a/src/Internal/Api/All.elm
+++ b/src/Internal/Api/All.elm
@@ -17,7 +17,7 @@ getEvent =
 
 {-| Get a list of members who are part of a Matrix room.
 -}
-joinedMembers : List String -> JoinedMembers.JoinedMembersInput -> JoinedMembers.JoinedMembersOutput
+joinedMembers : List String -> Maybe (JoinedMembers.JoinedMembersInput -> JoinedMembers.JoinedMembersOutput)
 joinedMembers =
     JoinedMembers.joinedMembers
 
diff --git a/src/Internal/Api/JoinedMembers/Api.elm b/src/Internal/Api/JoinedMembers/Api.elm
index cf961aa..ef22cd6 100644
--- a/src/Internal/Api/JoinedMembers/Api.elm
+++ b/src/Internal/Api/JoinedMembers/Api.elm
@@ -1,8 +1,8 @@
 module Internal.Api.JoinedMembers.Api exposing (..)
 
+import Internal.Api.JoinedMembers.V1.SpecObjects as SO1
 import Internal.Api.Request as R
 import Internal.Tools.Exceptions as X
-import Json.Decode as D
 import Task exposing (Task)
 
 
@@ -13,8 +13,12 @@ type alias JoinedMembersInputV1 =
     }
 
 
-joinedMembersInputV1 : D.Decoder a -> (a -> b) -> JoinedMembersInputV1 -> Task X.Error b
-joinedMembersInputV1 decoder mapping data =
+type alias JoinedMembersOutputV1 =
+    Task X.Error SO1.RoomMemberList
+
+
+joinedMembersInputV1 : JoinedMembersInputV1 -> JoinedMembersOutputV1
+joinedMembersInputV1 data =
     R.rawApiCall
         { headers = R.WithAccessToken data.accessToken
         , method = "GET"
@@ -26,5 +30,5 @@ joinedMembersInputV1 decoder mapping data =
         , queryParams = []
         , bodyParams = []
         , timeout = Nothing
-        , decoder = \_ -> D.map mapping decoder
+        , decoder = \_ -> SO1.roomMemberListDecoder
         }
diff --git a/src/Internal/Api/JoinedMembers/Main.elm b/src/Internal/Api/JoinedMembers/Main.elm
index df68bea..e341c2a 100644
--- a/src/Internal/Api/JoinedMembers/Main.elm
+++ b/src/Internal/Api/JoinedMembers/Main.elm
@@ -1,23 +1,20 @@
 module Internal.Api.JoinedMembers.Main exposing (..)
 
 import Internal.Api.JoinedMembers.Api as Api
-import Internal.Api.JoinedMembers.V1_2.Api as V1_2
-import Internal.Api.JoinedMembers.V1_3.Api as V1_3
-import Internal.Api.JoinedMembers.V1_4.Api as V1_4
-import Internal.Api.JoinedMembers.V1_5.Api as V1_5
-import Internal.Api.JoinedMembers.V1_5.Objects as O
-import Internal.Api.VersionControl as V
-import Internal.Tools.Exceptions as X
-import Task exposing (Task)
+import Internal.Tools.VersionControl as VC
 
 
-joinedMembers : List String -> JoinedMembersInput -> JoinedMembersOutput
-joinedMembers =
-    V.firstVersion V1_2.packet
-        |> V.updateWith V1_3.packet
-        |> V.updateWith V1_4.packet
-        |> V.updateWith V1_5.packet
-        |> V.toFunction
+joinedMembers : List String -> Maybe (JoinedMembersInput -> JoinedMembersOutput)
+joinedMembers versions =
+    VC.withBottomLayer
+        { current = Api.joinedMembersInputV1
+        , version = "v1.1"
+        }
+        |> VC.sameForVersion "v1.2"
+        |> VC.sameForVersion "v1.3"
+        |> VC.sameForVersion "v1.4"
+        |> VC.sameForVersion "v1.5"
+        |> VC.mostRecentFromVersionList versions
 
 
 type alias JoinedMembersInput =
@@ -25,4 +22,4 @@ type alias JoinedMembersInput =
 
 
 type alias JoinedMembersOutput =
-    Task X.Error O.RoomMemberList
+    Api.JoinedMembersOutputV1
diff --git a/src/Internal/Api/JoinedMembers/V1_2/SpecObjects.elm b/src/Internal/Api/JoinedMembers/V1/SpecObjects.elm
similarity index 93%
rename from src/Internal/Api/JoinedMembers/V1_2/SpecObjects.elm
rename to src/Internal/Api/JoinedMembers/V1/SpecObjects.elm
index 5e339b5..fe093f1 100644
--- a/src/Internal/Api/JoinedMembers/V1_2/SpecObjects.elm
+++ b/src/Internal/Api/JoinedMembers/V1/SpecObjects.elm
@@ -1,4 +1,4 @@
-module Internal.Api.JoinedMembers.V1_2.SpecObjects exposing
+module Internal.Api.JoinedMembers.V1.SpecObjects exposing
     ( RoomMember
     , RoomMemberList
     , encodeRoomMember
@@ -9,7 +9,7 @@ module Internal.Api.JoinedMembers.V1_2.SpecObjects exposing
 
 {-| Automatically generated 'SpecObjects'
 
-Last generated at Unix time 1673279712
+Last generated at Unix time 1676307378
 
 -}
 
diff --git a/src/Internal/Api/JoinedMembers/V1_4/SpecObjects.yaml b/src/Internal/Api/JoinedMembers/V1/SpecObjects.yaml
similarity index 96%
rename from src/Internal/Api/JoinedMembers/V1_4/SpecObjects.yaml
rename to src/Internal/Api/JoinedMembers/V1/SpecObjects.yaml
index 0f3c6a1..c562a6c 100644
--- a/src/Internal/Api/JoinedMembers/V1_4/SpecObjects.yaml
+++ b/src/Internal/Api/JoinedMembers/V1/SpecObjects.yaml
@@ -1,4 +1,4 @@
-version: v1.4
+version: v1
 name: SpecObjects
 objects:
   RoomMemberList:
diff --git a/src/Internal/Api/JoinedMembers/V1_2/Api.elm b/src/Internal/Api/JoinedMembers/V1_2/Api.elm
deleted file mode 100644
index e6477d9..0000000
--- a/src/Internal/Api/JoinedMembers/V1_2/Api.elm
+++ /dev/null
@@ -1,17 +0,0 @@
-module Internal.Api.JoinedMembers.V1_2.Api exposing (..)
-
-import Internal.Api.JoinedMembers.Api as Api
-import Internal.Api.JoinedMembers.V1_2.Convert as C
-import Internal.Api.JoinedMembers.V1_2.Objects as O
-import Internal.Api.JoinedMembers.V1_2.SpecObjects as SO
-import Internal.Api.JoinedMembers.V1_2.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion () () Api.JoinedMembersInputV1 O.RoomMemberList
-packet =
-    { version = "v1.2"
-    , downcast = \_ -> ()
-    , current = Api.joinedMembersInputV1 SO.roomMemberListDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/JoinedMembers/V1_2/Convert.elm b/src/Internal/Api/JoinedMembers/V1_2/Convert.elm
deleted file mode 100644
index 248216e..0000000
--- a/src/Internal/Api/JoinedMembers/V1_2/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_2.Convert exposing (..)
-
-import Internal.Api.JoinedMembers.V1_2.Objects as O
-import Internal.Api.JoinedMembers.V1_2.SpecObjects as SO
-
-
-convert : SO.RoomMemberList -> O.RoomMemberList
-convert =
-    identity
diff --git a/src/Internal/Api/JoinedMembers/V1_2/Objects.elm b/src/Internal/Api/JoinedMembers/V1_2/Objects.elm
deleted file mode 100644
index 55d0b4c..0000000
--- a/src/Internal/Api/JoinedMembers/V1_2/Objects.elm
+++ /dev/null
@@ -1,69 +0,0 @@
-module Internal.Api.JoinedMembers.V1_2.Objects exposing
-    ( RoomMember
-    , RoomMemberList
-    , encodeRoomMember
-    , encodeRoomMemberList
-    , roomMemberDecoder
-    , roomMemberListDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Dict exposing (Dict)
-import Internal.Tools.DecodeExtra exposing (opField, opFieldWithDefault)
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| User information of joined users.
--}
-type alias RoomMember =
-    { avatarUrl : Maybe String
-    , displayName : Maybe String
-    }
-
-
-encodeRoomMember : RoomMember -> E.Value
-encodeRoomMember data =
-    maybeObject
-        [ ( "avatar_url", Maybe.map E.string data.avatarUrl )
-        , ( "display_name", Maybe.map E.string data.displayName )
-        ]
-
-
-roomMemberDecoder : D.Decoder RoomMember
-roomMemberDecoder =
-    D.map2
-        (\a b ->
-            { avatarUrl = a, displayName = b }
-        )
-        (opField "avatar_url" D.string)
-        (opField "display_name" D.string)
-
-
-{-| The dictionary containing all room member data.
--}
-type alias RoomMemberList =
-    { joined : Dict String RoomMember
-    }
-
-
-encodeRoomMemberList : RoomMemberList -> E.Value
-encodeRoomMemberList data =
-    maybeObject
-        [ ( "joined", Just <| E.dict identity encodeRoomMember data.joined )
-        ]
-
-
-roomMemberListDecoder : D.Decoder RoomMemberList
-roomMemberListDecoder =
-    D.map
-        (\a ->
-            { joined = a }
-        )
-        (opFieldWithDefault "joined" Dict.empty (D.dict roomMemberDecoder))
diff --git a/src/Internal/Api/JoinedMembers/V1_2/Objects.yaml b/src/Internal/Api/JoinedMembers/V1_2/Objects.yaml
deleted file mode 100644
index 61d6109..0000000
--- a/src/Internal/Api/JoinedMembers/V1_2/Objects.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-version: v1.2
-name: Objects
-objects:
-  RoomMemberList:
-    description: The dictionary containing all room member data.
-    fields:
-      joined:
-        type: "{RoomMember}"
-        required: false
-        default: Dict.empty
-  RoomMember:
-    description: User information of joined users.
-    fields:
-      avatar_url:
-        type: string
-      display_name:
-        type: string
diff --git a/src/Internal/Api/JoinedMembers/V1_2/SpecObjects.yaml b/src/Internal/Api/JoinedMembers/V1_2/SpecObjects.yaml
deleted file mode 100644
index cd9b3a4..0000000
--- a/src/Internal/Api/JoinedMembers/V1_2/SpecObjects.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-version: v1.2
-name: SpecObjects
-objects:
-  RoomMemberList:
-    description: The dictionary containing all room member data.
-    fields:
-      joined:
-        type: "{RoomMember}"
-        required: false
-        default: Dict.empty
-  RoomMember:
-    description: User information of joined users.
-    fields:
-      avatar_url:
-        type: string
-      display_name:
-        type: string
diff --git a/src/Internal/Api/JoinedMembers/V1_2/Upcast.elm b/src/Internal/Api/JoinedMembers/V1_2/Upcast.elm
deleted file mode 100644
index 70d4eee..0000000
--- a/src/Internal/Api/JoinedMembers/V1_2/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_2.Upcast exposing (..)
-
-import Dict
-import Internal.Api.JoinedMembers.V1_2.Objects as O
-
-
-upcast : () -> O.RoomMemberList
-upcast _ =
-    { joined = Dict.empty }
diff --git a/src/Internal/Api/JoinedMembers/V1_3/Api.elm b/src/Internal/Api/JoinedMembers/V1_3/Api.elm
deleted file mode 100644
index bfe1ccb..0000000
--- a/src/Internal/Api/JoinedMembers/V1_3/Api.elm
+++ /dev/null
@@ -1,18 +0,0 @@
-module Internal.Api.JoinedMembers.V1_3.Api exposing (..)
-
-import Internal.Api.JoinedMembers.Api as Api
-import Internal.Api.JoinedMembers.V1_2.Objects as PO
-import Internal.Api.JoinedMembers.V1_3.Convert as C
-import Internal.Api.JoinedMembers.V1_3.Objects as O
-import Internal.Api.JoinedMembers.V1_3.SpecObjects as SO
-import Internal.Api.JoinedMembers.V1_3.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion Api.JoinedMembersInputV1 PO.RoomMemberList Api.JoinedMembersInputV1 O.RoomMemberList
-packet =
-    { version = "v1.3"
-    , downcast = identity
-    , current = Api.joinedMembersInputV1 SO.roomMemberListDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/JoinedMembers/V1_3/Convert.elm b/src/Internal/Api/JoinedMembers/V1_3/Convert.elm
deleted file mode 100644
index 7c86004..0000000
--- a/src/Internal/Api/JoinedMembers/V1_3/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_3.Convert exposing (..)
-
-import Internal.Api.JoinedMembers.V1_3.Objects as O
-import Internal.Api.JoinedMembers.V1_3.SpecObjects as SO
-
-
-convert : SO.RoomMemberList -> O.RoomMemberList
-convert =
-    identity
diff --git a/src/Internal/Api/JoinedMembers/V1_3/Objects.elm b/src/Internal/Api/JoinedMembers/V1_3/Objects.elm
deleted file mode 100644
index cac7445..0000000
--- a/src/Internal/Api/JoinedMembers/V1_3/Objects.elm
+++ /dev/null
@@ -1,69 +0,0 @@
-module Internal.Api.JoinedMembers.V1_3.Objects exposing
-    ( RoomMember
-    , RoomMemberList
-    , encodeRoomMember
-    , encodeRoomMemberList
-    , roomMemberDecoder
-    , roomMemberListDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Dict exposing (Dict)
-import Internal.Tools.DecodeExtra exposing (opField, opFieldWithDefault)
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| User information of joined users.
--}
-type alias RoomMember =
-    { avatarUrl : Maybe String
-    , displayName : Maybe String
-    }
-
-
-encodeRoomMember : RoomMember -> E.Value
-encodeRoomMember data =
-    maybeObject
-        [ ( "avatar_url", Maybe.map E.string data.avatarUrl )
-        , ( "display_name", Maybe.map E.string data.displayName )
-        ]
-
-
-roomMemberDecoder : D.Decoder RoomMember
-roomMemberDecoder =
-    D.map2
-        (\a b ->
-            { avatarUrl = a, displayName = b }
-        )
-        (opField "avatar_url" D.string)
-        (opField "display_name" D.string)
-
-
-{-| The dictionary containing all room member data.
--}
-type alias RoomMemberList =
-    { joined : Dict String RoomMember
-    }
-
-
-encodeRoomMemberList : RoomMemberList -> E.Value
-encodeRoomMemberList data =
-    maybeObject
-        [ ( "joined", Just <| E.dict identity encodeRoomMember data.joined )
-        ]
-
-
-roomMemberListDecoder : D.Decoder RoomMemberList
-roomMemberListDecoder =
-    D.map
-        (\a ->
-            { joined = a }
-        )
-        (opFieldWithDefault "joined" Dict.empty (D.dict roomMemberDecoder))
diff --git a/src/Internal/Api/JoinedMembers/V1_3/Objects.yaml b/src/Internal/Api/JoinedMembers/V1_3/Objects.yaml
deleted file mode 100644
index b6f839c..0000000
--- a/src/Internal/Api/JoinedMembers/V1_3/Objects.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-version: v1.3
-name: Objects
-objects:
-  RoomMemberList:
-    description: The dictionary containing all room member data.
-    fields:
-      joined:
-        type: "{RoomMember}"
-        required: false
-        default: Dict.empty
-  RoomMember:
-    description: User information of joined users.
-    fields:
-      avatar_url:
-        type: string
-      display_name:
-        type: string
diff --git a/src/Internal/Api/JoinedMembers/V1_3/SpecObjects.elm b/src/Internal/Api/JoinedMembers/V1_3/SpecObjects.elm
deleted file mode 100644
index 3d2d5e9..0000000
--- a/src/Internal/Api/JoinedMembers/V1_3/SpecObjects.elm
+++ /dev/null
@@ -1,69 +0,0 @@
-module Internal.Api.JoinedMembers.V1_3.SpecObjects exposing
-    ( RoomMember
-    , RoomMemberList
-    , encodeRoomMember
-    , encodeRoomMemberList
-    , roomMemberDecoder
-    , roomMemberListDecoder
-    )
-
-{-| Automatically generated 'SpecObjects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Dict exposing (Dict)
-import Internal.Tools.DecodeExtra exposing (opField, opFieldWithDefault)
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| User information of joined users.
--}
-type alias RoomMember =
-    { avatarUrl : Maybe String
-    , displayName : Maybe String
-    }
-
-
-encodeRoomMember : RoomMember -> E.Value
-encodeRoomMember data =
-    maybeObject
-        [ ( "avatar_url", Maybe.map E.string data.avatarUrl )
-        , ( "display_name", Maybe.map E.string data.displayName )
-        ]
-
-
-roomMemberDecoder : D.Decoder RoomMember
-roomMemberDecoder =
-    D.map2
-        (\a b ->
-            { avatarUrl = a, displayName = b }
-        )
-        (opField "avatar_url" D.string)
-        (opField "display_name" D.string)
-
-
-{-| The dictionary containing all room member data.
--}
-type alias RoomMemberList =
-    { joined : Dict String RoomMember
-    }
-
-
-encodeRoomMemberList : RoomMemberList -> E.Value
-encodeRoomMemberList data =
-    maybeObject
-        [ ( "joined", Just <| E.dict identity encodeRoomMember data.joined )
-        ]
-
-
-roomMemberListDecoder : D.Decoder RoomMemberList
-roomMemberListDecoder =
-    D.map
-        (\a ->
-            { joined = a }
-        )
-        (opFieldWithDefault "joined" Dict.empty (D.dict roomMemberDecoder))
diff --git a/src/Internal/Api/JoinedMembers/V1_3/SpecObjects.yaml b/src/Internal/Api/JoinedMembers/V1_3/SpecObjects.yaml
deleted file mode 100644
index 01800ab..0000000
--- a/src/Internal/Api/JoinedMembers/V1_3/SpecObjects.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-version: v1.3
-name: SpecObjects
-objects:
-  RoomMemberList:
-    description: The dictionary containing all room member data.
-    fields:
-      joined:
-        type: "{RoomMember}"
-        required: false
-        default: Dict.empty
-  RoomMember:
-    description: User information of joined users.
-    fields:
-      avatar_url:
-        type: string
-      display_name:
-        type: string
diff --git a/src/Internal/Api/JoinedMembers/V1_3/Upcast.elm b/src/Internal/Api/JoinedMembers/V1_3/Upcast.elm
deleted file mode 100644
index 153a236..0000000
--- a/src/Internal/Api/JoinedMembers/V1_3/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_3.Upcast exposing (..)
-
-import Internal.Api.JoinedMembers.V1_2.Objects as PO
-import Internal.Api.JoinedMembers.V1_3.Objects as O
-
-
-upcast : PO.RoomMemberList -> O.RoomMemberList
-upcast =
-    identity
diff --git a/src/Internal/Api/JoinedMembers/V1_4/Api.elm b/src/Internal/Api/JoinedMembers/V1_4/Api.elm
deleted file mode 100644
index f999577..0000000
--- a/src/Internal/Api/JoinedMembers/V1_4/Api.elm
+++ /dev/null
@@ -1,18 +0,0 @@
-module Internal.Api.JoinedMembers.V1_4.Api exposing (..)
-
-import Internal.Api.JoinedMembers.Api as Api
-import Internal.Api.JoinedMembers.V1_3.Objects as PO
-import Internal.Api.JoinedMembers.V1_4.Convert as C
-import Internal.Api.JoinedMembers.V1_4.Objects as O
-import Internal.Api.JoinedMembers.V1_4.SpecObjects as SO
-import Internal.Api.JoinedMembers.V1_4.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion Api.JoinedMembersInputV1 PO.RoomMemberList Api.JoinedMembersInputV1 O.RoomMemberList
-packet =
-    { version = "v1.4"
-    , downcast = identity
-    , current = Api.joinedMembersInputV1 SO.roomMemberListDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/JoinedMembers/V1_4/Convert.elm b/src/Internal/Api/JoinedMembers/V1_4/Convert.elm
deleted file mode 100644
index eb133ef..0000000
--- a/src/Internal/Api/JoinedMembers/V1_4/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_4.Convert exposing (..)
-
-import Internal.Api.JoinedMembers.V1_4.Objects as O
-import Internal.Api.JoinedMembers.V1_4.SpecObjects as SO
-
-
-convert : SO.RoomMemberList -> O.RoomMemberList
-convert =
-    identity
diff --git a/src/Internal/Api/JoinedMembers/V1_4/Objects.elm b/src/Internal/Api/JoinedMembers/V1_4/Objects.elm
deleted file mode 100644
index 8fd5b3d..0000000
--- a/src/Internal/Api/JoinedMembers/V1_4/Objects.elm
+++ /dev/null
@@ -1,69 +0,0 @@
-module Internal.Api.JoinedMembers.V1_4.Objects exposing
-    ( RoomMember
-    , RoomMemberList
-    , encodeRoomMember
-    , encodeRoomMemberList
-    , roomMemberDecoder
-    , roomMemberListDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Dict exposing (Dict)
-import Internal.Tools.DecodeExtra exposing (opField, opFieldWithDefault)
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| User information of joined users.
--}
-type alias RoomMember =
-    { avatarUrl : Maybe String
-    , displayName : Maybe String
-    }
-
-
-encodeRoomMember : RoomMember -> E.Value
-encodeRoomMember data =
-    maybeObject
-        [ ( "avatar_url", Maybe.map E.string data.avatarUrl )
-        , ( "display_name", Maybe.map E.string data.displayName )
-        ]
-
-
-roomMemberDecoder : D.Decoder RoomMember
-roomMemberDecoder =
-    D.map2
-        (\a b ->
-            { avatarUrl = a, displayName = b }
-        )
-        (opField "avatar_url" D.string)
-        (opField "display_name" D.string)
-
-
-{-| The dictionary containing all room member data.
--}
-type alias RoomMemberList =
-    { joined : Dict String RoomMember
-    }
-
-
-encodeRoomMemberList : RoomMemberList -> E.Value
-encodeRoomMemberList data =
-    maybeObject
-        [ ( "joined", Just <| E.dict identity encodeRoomMember data.joined )
-        ]
-
-
-roomMemberListDecoder : D.Decoder RoomMemberList
-roomMemberListDecoder =
-    D.map
-        (\a ->
-            { joined = a }
-        )
-        (opFieldWithDefault "joined" Dict.empty (D.dict roomMemberDecoder))
diff --git a/src/Internal/Api/JoinedMembers/V1_4/Objects.yaml b/src/Internal/Api/JoinedMembers/V1_4/Objects.yaml
deleted file mode 100644
index cb0d543..0000000
--- a/src/Internal/Api/JoinedMembers/V1_4/Objects.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-version: v1.4
-name: Objects
-objects:
-  RoomMemberList:
-    description: The dictionary containing all room member data.
-    fields:
-      joined:
-        type: "{RoomMember}"
-        required: false
-        default: Dict.empty
-  RoomMember:
-    description: User information of joined users.
-    fields:
-      avatar_url:
-        type: string
-      display_name:
-        type: string
diff --git a/src/Internal/Api/JoinedMembers/V1_4/SpecObjects.elm b/src/Internal/Api/JoinedMembers/V1_4/SpecObjects.elm
deleted file mode 100644
index 5a580c7..0000000
--- a/src/Internal/Api/JoinedMembers/V1_4/SpecObjects.elm
+++ /dev/null
@@ -1,69 +0,0 @@
-module Internal.Api.JoinedMembers.V1_4.SpecObjects exposing
-    ( RoomMember
-    , RoomMemberList
-    , encodeRoomMember
-    , encodeRoomMemberList
-    , roomMemberDecoder
-    , roomMemberListDecoder
-    )
-
-{-| Automatically generated 'SpecObjects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Dict exposing (Dict)
-import Internal.Tools.DecodeExtra exposing (opField, opFieldWithDefault)
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| User information of joined users.
--}
-type alias RoomMember =
-    { avatarUrl : Maybe String
-    , displayName : Maybe String
-    }
-
-
-encodeRoomMember : RoomMember -> E.Value
-encodeRoomMember data =
-    maybeObject
-        [ ( "avatar_url", Maybe.map E.string data.avatarUrl )
-        , ( "display_name", Maybe.map E.string data.displayName )
-        ]
-
-
-roomMemberDecoder : D.Decoder RoomMember
-roomMemberDecoder =
-    D.map2
-        (\a b ->
-            { avatarUrl = a, displayName = b }
-        )
-        (opField "avatar_url" D.string)
-        (opField "display_name" D.string)
-
-
-{-| The dictionary containing all room member data.
--}
-type alias RoomMemberList =
-    { joined : Dict String RoomMember
-    }
-
-
-encodeRoomMemberList : RoomMemberList -> E.Value
-encodeRoomMemberList data =
-    maybeObject
-        [ ( "joined", Just <| E.dict identity encodeRoomMember data.joined )
-        ]
-
-
-roomMemberListDecoder : D.Decoder RoomMemberList
-roomMemberListDecoder =
-    D.map
-        (\a ->
-            { joined = a }
-        )
-        (opFieldWithDefault "joined" Dict.empty (D.dict roomMemberDecoder))
diff --git a/src/Internal/Api/JoinedMembers/V1_4/Upcast.elm b/src/Internal/Api/JoinedMembers/V1_4/Upcast.elm
deleted file mode 100644
index f8690fe..0000000
--- a/src/Internal/Api/JoinedMembers/V1_4/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_4.Upcast exposing (..)
-
-import Internal.Api.JoinedMembers.V1_3.Objects as PO
-import Internal.Api.JoinedMembers.V1_4.Objects as O
-
-
-upcast : PO.RoomMemberList -> O.RoomMemberList
-upcast =
-    identity
diff --git a/src/Internal/Api/JoinedMembers/V1_5/Api.elm b/src/Internal/Api/JoinedMembers/V1_5/Api.elm
deleted file mode 100644
index 9a2237e..0000000
--- a/src/Internal/Api/JoinedMembers/V1_5/Api.elm
+++ /dev/null
@@ -1,18 +0,0 @@
-module Internal.Api.JoinedMembers.V1_5.Api exposing (..)
-
-import Internal.Api.JoinedMembers.Api as Api
-import Internal.Api.JoinedMembers.V1_4.Objects as PO
-import Internal.Api.JoinedMembers.V1_5.Convert as C
-import Internal.Api.JoinedMembers.V1_5.Objects as O
-import Internal.Api.JoinedMembers.V1_5.SpecObjects as SO
-import Internal.Api.JoinedMembers.V1_5.Upcast as U
-import Internal.Api.VersionControl as V
-
-
-packet : V.SingleVersion Api.JoinedMembersInputV1 PO.RoomMemberList Api.JoinedMembersInputV1 O.RoomMemberList
-packet =
-    { version = "v1.5"
-    , downcast = identity
-    , current = Api.joinedMembersInputV1 SO.roomMemberListDecoder C.convert
-    , upcast = U.upcast
-    }
diff --git a/src/Internal/Api/JoinedMembers/V1_5/Convert.elm b/src/Internal/Api/JoinedMembers/V1_5/Convert.elm
deleted file mode 100644
index 47792f9..0000000
--- a/src/Internal/Api/JoinedMembers/V1_5/Convert.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_5.Convert exposing (..)
-
-import Internal.Api.JoinedMembers.V1_5.Objects as O
-import Internal.Api.JoinedMembers.V1_5.SpecObjects as SO
-
-
-convert : SO.RoomMemberList -> O.RoomMemberList
-convert =
-    identity
diff --git a/src/Internal/Api/JoinedMembers/V1_5/Objects.elm b/src/Internal/Api/JoinedMembers/V1_5/Objects.elm
deleted file mode 100644
index 4dbae53..0000000
--- a/src/Internal/Api/JoinedMembers/V1_5/Objects.elm
+++ /dev/null
@@ -1,69 +0,0 @@
-module Internal.Api.JoinedMembers.V1_5.Objects exposing
-    ( RoomMember
-    , RoomMemberList
-    , encodeRoomMember
-    , encodeRoomMemberList
-    , roomMemberDecoder
-    , roomMemberListDecoder
-    )
-
-{-| Automatically generated 'Objects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Dict exposing (Dict)
-import Internal.Tools.DecodeExtra exposing (opField, opFieldWithDefault)
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| User information of joined users.
--}
-type alias RoomMember =
-    { avatarUrl : Maybe String
-    , displayName : Maybe String
-    }
-
-
-encodeRoomMember : RoomMember -> E.Value
-encodeRoomMember data =
-    maybeObject
-        [ ( "avatar_url", Maybe.map E.string data.avatarUrl )
-        , ( "display_name", Maybe.map E.string data.displayName )
-        ]
-
-
-roomMemberDecoder : D.Decoder RoomMember
-roomMemberDecoder =
-    D.map2
-        (\a b ->
-            { avatarUrl = a, displayName = b }
-        )
-        (opField "avatar_url" D.string)
-        (opField "display_name" D.string)
-
-
-{-| The dictionary containing all room member data.
--}
-type alias RoomMemberList =
-    { joined : Dict String RoomMember
-    }
-
-
-encodeRoomMemberList : RoomMemberList -> E.Value
-encodeRoomMemberList data =
-    maybeObject
-        [ ( "joined", Just <| E.dict identity encodeRoomMember data.joined )
-        ]
-
-
-roomMemberListDecoder : D.Decoder RoomMemberList
-roomMemberListDecoder =
-    D.map
-        (\a ->
-            { joined = a }
-        )
-        (opFieldWithDefault "joined" Dict.empty (D.dict roomMemberDecoder))
diff --git a/src/Internal/Api/JoinedMembers/V1_5/Objects.yaml b/src/Internal/Api/JoinedMembers/V1_5/Objects.yaml
deleted file mode 100644
index bfac3f6..0000000
--- a/src/Internal/Api/JoinedMembers/V1_5/Objects.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-version: v1.5
-name: Objects
-objects:
-  RoomMemberList:
-    description: The dictionary containing all room member data.
-    fields:
-      joined:
-        type: "{RoomMember}"
-        required: false
-        default: Dict.empty
-  RoomMember:
-    description: User information of joined users.
-    fields:
-      avatar_url:
-        type: string
-      display_name:
-        type: string
diff --git a/src/Internal/Api/JoinedMembers/V1_5/SpecObjects.elm b/src/Internal/Api/JoinedMembers/V1_5/SpecObjects.elm
deleted file mode 100644
index a9b5697..0000000
--- a/src/Internal/Api/JoinedMembers/V1_5/SpecObjects.elm
+++ /dev/null
@@ -1,69 +0,0 @@
-module Internal.Api.JoinedMembers.V1_5.SpecObjects exposing
-    ( RoomMember
-    , RoomMemberList
-    , encodeRoomMember
-    , encodeRoomMemberList
-    , roomMemberDecoder
-    , roomMemberListDecoder
-    )
-
-{-| Automatically generated 'SpecObjects'
-
-Last generated at Unix time 1673279712
-
--}
-
-import Dict exposing (Dict)
-import Internal.Tools.DecodeExtra exposing (opField, opFieldWithDefault)
-import Internal.Tools.EncodeExtra exposing (maybeObject)
-import Json.Decode as D
-import Json.Encode as E
-
-
-{-| User information of joined users.
--}
-type alias RoomMember =
-    { avatarUrl : Maybe String
-    , displayName : Maybe String
-    }
-
-
-encodeRoomMember : RoomMember -> E.Value
-encodeRoomMember data =
-    maybeObject
-        [ ( "avatar_url", Maybe.map E.string data.avatarUrl )
-        , ( "display_name", Maybe.map E.string data.displayName )
-        ]
-
-
-roomMemberDecoder : D.Decoder RoomMember
-roomMemberDecoder =
-    D.map2
-        (\a b ->
-            { avatarUrl = a, displayName = b }
-        )
-        (opField "avatar_url" D.string)
-        (opField "display_name" D.string)
-
-
-{-| The dictionary containing all room member data.
--}
-type alias RoomMemberList =
-    { joined : Dict String RoomMember
-    }
-
-
-encodeRoomMemberList : RoomMemberList -> E.Value
-encodeRoomMemberList data =
-    maybeObject
-        [ ( "joined", Just <| E.dict identity encodeRoomMember data.joined )
-        ]
-
-
-roomMemberListDecoder : D.Decoder RoomMemberList
-roomMemberListDecoder =
-    D.map
-        (\a ->
-            { joined = a }
-        )
-        (opFieldWithDefault "joined" Dict.empty (D.dict roomMemberDecoder))
diff --git a/src/Internal/Api/JoinedMembers/V1_5/SpecObjects.yaml b/src/Internal/Api/JoinedMembers/V1_5/SpecObjects.yaml
deleted file mode 100644
index 2e913eb..0000000
--- a/src/Internal/Api/JoinedMembers/V1_5/SpecObjects.yaml
+++ /dev/null
@@ -1,17 +0,0 @@
-version: v1.5
-name: SpecObjects
-objects:
-  RoomMemberList:
-    description: The dictionary containing all room member data.
-    fields:
-      joined:
-        type: "{RoomMember}"
-        required: false
-        default: Dict.empty
-  RoomMember:
-    description: User information of joined users.
-    fields:
-      avatar_url:
-        type: string
-      display_name:
-        type: string
diff --git a/src/Internal/Api/JoinedMembers/V1_5/Upcast.elm b/src/Internal/Api/JoinedMembers/V1_5/Upcast.elm
deleted file mode 100644
index ddfe1a0..0000000
--- a/src/Internal/Api/JoinedMembers/V1_5/Upcast.elm
+++ /dev/null
@@ -1,9 +0,0 @@
-module Internal.Api.JoinedMembers.V1_5.Upcast exposing (..)
-
-import Internal.Api.JoinedMembers.V1_4.Objects as PO
-import Internal.Api.JoinedMembers.V1_5.Objects as O
-
-
-upcast : PO.RoomMemberList -> O.RoomMemberList
-upcast =
-    identity