diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e27e18b..542ea76 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,6 @@
 name: CI
 
-on: [push]
+on: [pull_request, push]
 
 jobs:
   # Code formatting.
diff --git a/.github/workflows/version.yml b/.github/workflows/version.yml
index 9df552f..e0d168f 100644
--- a/.github/workflows/version.yml
+++ b/.github/workflows/version.yml
@@ -1,6 +1,6 @@
 name: Rust version compatibility check
 
-on: [push]
+on: [pull_request, push]
 
 jobs:
   build: