diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c08c47b5..000f4b72 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,10 @@
 name: ci
 
 on:
+  pull_request:
   push:
+    branches:
+      - master
     paths-ignore:
       - '*.md'