diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 56bae12..0069782 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,10 +3,10 @@ name: ci
 on:
   push:
     branches:
-      - '**'
-    tags:
-      - '**'
+    - master
   pull_request:
+  # enable manual trigger
+  workflow_dispatch:
 
 jobs:
   docker: