diff --git a/apps/alpinenav/README.md b/apps/alpinenav/README.md
index e4e9fc491..97dc45706 100644
--- a/apps/alpinenav/README.md
+++ b/apps/alpinenav/README.md
@@ -2,7 +2,7 @@ Alpine Navigator
 ================
 App that performs GPS monitoring to track and display position relative to a given origin in realtime.
 
-![screenshot](./sample.PNG)  
+![screenshot](./sample.png)  
 
 Functions
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