diff --git a/.github/workflows/abi.yml b/.github/workflows/abi.yml
index e3792a5ab..3926a9084 100644
--- a/.github/workflows/abi.yml
+++ b/.github/workflows/abi.yml
@@ -1,6 +1,12 @@
 name: ABI Checks
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
 
 jobs:
   abicheck:
diff --git a/.github/workflows/ios.yml b/.github/workflows/ios.yml
index 75fa3e069..6415e43dc 100644
--- a/.github/workflows/ios.yml
+++ b/.github/workflows/ios.yml
@@ -1,6 +1,12 @@
 name: iOS
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
 
 jobs:
   ios:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 68d68d01a..fe39d96e4 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -1,6 +1,12 @@
 name: lint
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
 
 jobs:
   lint:
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index bf8b7da26..2b6a1f95f 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -1,6 +1,12 @@
 name: MinGW-w64 Test
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
 
 jobs:
   MinGW-w64-build:
diff --git a/.github/workflows/run-on-arch.yml b/.github/workflows/run-on-arch.yml
index 6be3488ce..5a2c66137 100644
--- a/.github/workflows/run-on-arch.yml
+++ b/.github/workflows/run-on-arch.yml
@@ -1,4 +1,10 @@
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
 
 jobs:
   build_job:
diff --git a/.github/workflows/ssl.yml b/.github/workflows/ssl.yml
index 510346c89..39822f776 100644
--- a/.github/workflows/ssl.yml
+++ b/.github/workflows/ssl.yml
@@ -1,6 +1,12 @@
 name: OpenSSL no-deprecated and LibreSSL
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
 
 jobs:
   ssl:
diff --git a/.github/workflows/valgrind.yml b/.github/workflows/valgrind.yml
index 6cfa3a44e..201a5fa15 100644
--- a/.github/workflows/valgrind.yml
+++ b/.github/workflows/valgrind.yml
@@ -1,6 +1,12 @@
 name: valgrind leak check
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
 
 jobs:
   valgrind: