diff --git a/language.cabal b/language.cabal
index 0c68f81..6fc24c9 100644
--- a/language.cabal
+++ b/language.cabal
@@ -71,7 +71,7 @@ executable language
     build-depends:    base ^>=4.16.3.0
 
     -- Directories containing source files.
-    hs-source-dirs:   app
+    hs-source-dirs:   src
 
     -- Base language which the package is written in.
     default-language: GHC2021
diff --git a/app/Main.hs b/src/Main.hs
similarity index 100%
rename from app/Main.hs
rename to src/Main.hs