diff --git a/reference/haskell/.gitignore b/reference/haskell/.gitignore
index 9d8f9f5..461007b 100644
--- a/reference/haskell/.gitignore
+++ b/reference/haskell/.gitignore
@@ -3,4 +3,5 @@
 dist
 dist-newstyle
 *.json
-json/
\ No newline at end of file
+json/
+tmp
\ No newline at end of file