thodg/libgit2

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index cd37095..38b4a04 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -1,10 +1,7 @@
 name: "CodeQL"
 
 on:
-  push:
-    branches: [ master, maint/* ]
-  pull_request:
-    branches: [ master, maint/* ]
+  workflow_dispatch:
   schedule:
     - cron: '21 3 * * 1'