diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
index fb72049..fbd1588 100644
--- a/.github/workflows/haskell-ci.yml
+++ b/.github/workflows/haskell-ci.yml
@@ -1,6 +1,7 @@
 name: Haskell CI
 
 on:
+  workflow_dispatch:
   push:
     branches: [ "master" ]
   pull_request: