diff --git a/Makefile b/Makefile
index 9698068..e5deb8d 100644
--- a/Makefile
+++ b/Makefile
@@ -15,7 +15,7 @@ repl: update
 	wasm32-wasi-cabal repl app -finteractive --repl-options='-fghci-browser -fghci-browser-port=8080'
 
 watch:
-	ghciwatch --after-startup-ghci :main --after-reload-ghci :main --watch app/*.hs --debounce 50ms --command 'wasm32-wasi-cabal repl app -finteractive --repl-options="-fghci-browser -fghci-browser-port=8080"'
+	ghciwatch --after-startup-ghci :main --after-reload-ghci :main --watch app --debounce 50ms --command 'wasm32-wasi-cabal repl app -finteractive --repl-options="-fghci-browser -fghci-browser-port=8080"'
 
 build:
 	wasm32-wasi-cabal build