diff --git a/.woodpecker.yml b/.woodpecker.yml
index e8adf8b..5f95979 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -5,6 +5,7 @@ clone:
 
 pipeline:
   codespell:
+    when: { branch: master }
     image: alpine:latest
     commands:
       - apk add python3
@@ -13,6 +14,7 @@ pipeline:
       - codespell README.md CHANGELOG.md *.c *.h doc/*.scd
 
   subprojects:
+    when: { branch: master }
     image: alpine:latest
     commands:
       - apk add git
@@ -22,6 +24,7 @@ pipeline:
       - cd ..
 
   x64:
+    when: { branch: master }
     group: build
     image: alpine:latest
     commands:
@@ -72,6 +75,7 @@ pipeline:
       - cd ../..
 
   x86:
+    when: { branch: master }
     group: build
     image: i386/alpine:latest
     commands: