diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f7af34b2c..86898c1e9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,9 +2,12 @@ name: build
 
 on:
   push:
-    branches: [ "issues-431-gh-actions" ]
+    branches: 
+      - "master"
+      - "issues-431-gh-actions" 
   pull_request:
-    branches: [ "master" ]
+    branches: 
+      - "master"
 
   # run workflow manually from the Actions tab
   workflow_dispatch: