diff --git a/.github/workflows/cxx-python.yml b/.github/workflows/cxx-python.yml
index b7ca78649..5489c24f6 100644
--- a/.github/workflows/cxx-python.yml
+++ b/.github/workflows/cxx-python.yml
@@ -1,6 +1,12 @@
 name: C++,Native Python
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 env:
   ITKMeshToPolyData-git-tag: "v0.11.0"
diff --git a/.github/workflows/cypress.yml b/.github/workflows/cypress.yml
index 3e6b331a1..7deca5f81 100644
--- a/.github/workflows/cypress.yml
+++ b/.github/workflows/cypress.yml
@@ -1,6 +1,12 @@
 name: Browser Tests
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 defaults:
   run:
diff --git a/.github/workflows/examples.yml b/.github/workflows/examples.yml
index 4880ca749..ee4186a25 100644
--- a/.github/workflows/examples.yml
+++ b/.github/workflows/examples.yml
@@ -1,6 +1,12 @@
 name: Examples
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
   test-node-example:
diff --git a/.github/workflows/javascript-typescript.yml b/.github/workflows/javascript-typescript.yml
index df33dfa67..a26ca4a11 100644
--- a/.github/workflows/javascript-typescript.yml
+++ b/.github/workflows/javascript-typescript.yml
@@ -1,6 +1,12 @@
 name: Node.js Tests
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 defaults:
   run:
diff --git a/.github/workflows/python-wasm.yml b/.github/workflows/python-wasm.yml
index 4ca614dbd..6712df9cd 100644
--- a/.github/workflows/python-wasm.yml
+++ b/.github/workflows/python-wasm.yml
@@ -1,6 +1,12 @@
 name: Python Wasm
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 env:
   pyodide-version: 0.24.1
diff --git a/.github/workflows/toolchains.yml b/.github/workflows/toolchains.yml
index 0cf31e593..2b048571d 100644
--- a/.github/workflows/toolchains.yml
+++ b/.github/workflows/toolchains.yml
@@ -1,6 +1,12 @@
 name: Toolchains
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 env:
   OCI_EXE: docker
diff --git a/.github/workflows/wasi.yml b/.github/workflows/wasi.yml
index 89158fad0..6f6253ba7 100644
--- a/.github/workflows/wasi.yml
+++ b/.github/workflows/wasi.yml
@@ -1,6 +1,12 @@
 name: WASI
 
-on: [push,pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 defaults:
   run: