diff --git a/src/Internal/Api/Ban/Api.elm b/src/Internal/Api/Ban/Api.elm
new file mode 100644
index 0000000..c256a09
--- /dev/null
+++ b/src/Internal/Api/Ban/Api.elm
@@ -0,0 +1,43 @@
+module Internal.Api.Ban.Api exposing (..)
+
+import Internal.Api.GetEvent.V1.SpecObjects as SO1
+import Internal.Api.Request as R
+import Internal.Tools.Context as Context exposing (Context)
+import Internal.Tools.Exceptions as X
+import Json.Decode as D
+import Task exposing (Task)
+
+
+type alias BanInputV1 =
+    { reason : Maybe String
+    , roomId : String
+    , userId : String
+    }
+
+
+type alias BanOutputV1 =
+    ()
+
+
+banV1 : BanInputV1 -> Context { a | accessToken : (), baseUrl : () } -> Task X.Error BanOutputV1
+banV1 { reason, roomId, userId } =
+    R.callApi "POST" "/_matrix/client/r0/rooms/{roomId}/ban"
+        >> R.withAttributes
+            [ R.accessToken
+            , R.replaceInUrl "roomId" roomId
+            , R.bodyOpString "reason" reason
+            , R.bodyString "user_id" userId
+            ]
+        >> R.toTask (D.map (always ()) D.value)
+
+
+banV2 : BanInputV1 -> Context { a | accessToken : (), baseUrl : () } -> Task X.Error BanOutputV1
+banV2 { reason, roomId, userId } =
+    R.callApi "POST" "/_matrix/client/v3/rooms/{roomId}/ban"
+        >> R.withAttributes
+            [ R.accessToken
+            , R.replaceInUrl "roomId" roomId
+            , R.bodyOpString "reason" reason
+            , R.bodyString "user_id" userId
+            ]
+        >> R.toTask (D.map (always ()) D.value)
diff --git a/src/Internal/Api/Ban/Main.elm b/src/Internal/Api/Ban/Main.elm
new file mode 100644
index 0000000..32cd9cc
--- /dev/null
+++ b/src/Internal/Api/Ban/Main.elm
@@ -0,0 +1,46 @@
+module Internal.Api.Ban.Main exposing (..)
+
+import Internal.Api.Ban.Api as Api
+import Internal.Tools.Context as Context exposing (Context, VBA)
+import Internal.Tools.Exceptions as X
+import Internal.Tools.VersionControl as VC
+import Task exposing (Task)
+
+
+ban : Context (VBA a) -> BanInput -> Task X.Error BanOutput
+ban context input =
+    VC.withBottomLayer
+        { current = Api.banV1
+        , version = "r0.0.0"
+        }
+        |> VC.sameForVersion "r0.0.1"
+        |> VC.sameForVersion "r0.1.0"
+        |> VC.sameForVersion "r0.2.0"
+        |> VC.sameForVersion "r0.3.0"
+        |> VC.sameForVersion "r0.4.0"
+        |> VC.sameForVersion "r0.5.0"
+        |> VC.sameForVersion "r0.6.0"
+        |> VC.sameForVersion "r0.6.1"
+        |> VC.addMiddleLayer
+            { downcast = identity
+            , current = Api.banV2
+            , upcast = identity
+            , version = "v1.1"
+            }
+        |> VC.sameForVersion "v1.2"
+        |> VC.sameForVersion "v1.3"
+        |> VC.sameForVersion "v1.4"
+        |> VC.sameForVersion "v1.5"
+        |> VC.sameForVersion "v1.6"
+        |> VC.mostRecentFromVersionList (Context.getVersions context)
+        |> Maybe.withDefault (always <| always <| Task.fail X.UnsupportedSpecVersion)
+        |> (|>) input
+        |> (|>) context
+
+
+type alias BanInput =
+    Api.BanInputV1
+
+
+type alias BanOutput =
+    Api.BanOutputV1
diff --git a/src/Internal/Api/VaultUpdate.elm b/src/Internal/Api/VaultUpdate.elm
index cf66a4c..0b3e2f3 100644
--- a/src/Internal/Api/VaultUpdate.elm
+++ b/src/Internal/Api/VaultUpdate.elm
@@ -1,5 +1,6 @@
 module Internal.Api.VaultUpdate exposing (..)
 
+import Internal.Api.Ban.Main as Ban
 import Internal.Api.Chain as Chain exposing (IdemChain, TaskChain)
 import Internal.Api.Credentials as Credentials exposing (Credentials)
 import Internal.Api.GetEvent.Main as GetEvent
@@ -25,6 +26,7 @@ import Time
 type VaultUpdate
     = MultipleUpdates (List VaultUpdate)
       -- Updates as a result of API calls
+    | BanUser Ban.BanInput Ban.BanOutput
     | GetEvent GetEvent.EventInput GetEvent.EventOutput
     | GetMessages GetMessages.GetMessagesInput GetMessages.GetMessagesOutput
     | InviteSent Invite.InviteInput Invite.InviteOutput
@@ -102,6 +104,21 @@ accessToken ctoken =
                         }
 
 
+{-| Ban a user from a room.
+-}
+ban : Ban.BanInput -> IdemChain VaultUpdate (VBA a)
+ban input =
+    toChain
+        (\output ->
+            Chain.TaskChainPiece
+                { contextChange = identity
+                , messages = [ BanUser input output ]
+                }
+        )
+        Ban.ban
+        input
+
+
 {-| Get an event from the API.
 -}
 getEvent : GetEvent.EventInput -> IdemChain VaultUpdate (VBA { a | sentEvent : () })