diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cabddff7..1b0f46f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,10 @@
 name: Hakyber
 
-on: [push,pull_request]
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
 
 env:
   OPAMROOT: /home/charlie/.opam