diff --git a/.github/workflows/code-cov.yml b/.github/workflows/code-cov.yml
index 046ba910..520fbe97 100644
--- a/.github/workflows/code-cov.yml
+++ b/.github/workflows/code-cov.yml
@@ -1,8 +1,12 @@
 name: "Code Coverage"
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 env:
   COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index e16034f2..ffa48903 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -1,8 +1,12 @@
 name: "PHP Lint"
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 jobs:
   tests:
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 0ee24f83..08980c0c 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -1,8 +1,12 @@
 name: "PHPStan"
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 env:
   COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
diff --git a/.github/workflows/style-check.yml b/.github/workflows/style-check.yml
index 3431808c..1d228e58 100644
--- a/.github/workflows/style-check.yml
+++ b/.github/workflows/style-check.yml
@@ -1,8 +1,12 @@
 name: "Style Check"
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
 
 env:
   COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fdc62e5c..d6cb70b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - only check minProperties or maxProperties on objects ([#802](https://github.com/jsonrainbow/json-schema/pull/802))
 - replace filter_var for uri and uri-reference to userland code to be RFC 3986 compliant ([#800](https://github.com/jsonrainbow/json-schema/pull/800))
+- avoid duplicate workflow runs ([#804](https://github.com/jsonrainbow/json-schema/pull/804))
 
 ## Changed
 - replace icecave/parity with custom deep comparator ([#803](https://github.com/jsonrainbow/json-schema/pull/803))