diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 11aec2c..5a60709 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -1,8 +1,11 @@
 name: C/C++ CI
-contents: read
-pull-requests: write
+permissions:
+  contents: read
+  pull-requests: write
 
 on:
+  workflow_dispatch:
+    branches: [ "*" ]
   push:
     branches: [ "master" ]
   pull_request: