diff --git a/Elm.cabal b/Elm.cabal
index bbf96a7..aa48614 100644
--- a/Elm.cabal
+++ b/Elm.cabal
@@ -20,7 +20,7 @@ Category:            Compiler, Language
 
 Build-type:          Custom
 
-Extra-source-files:  changelog.txt
+Extra-source-files:  changelog.md
 Data-dir:            data
 Data-files:          elm-runtime.js interfaces.data docs.json
 Cabal-version:       >=1.9