diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9eb7796a..1340d9df 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,8 +2,11 @@ name: Build
 
 on: 
   push:
+    paths: 
+      - src/**
+      - lib/**
     branches:
-      - '*'
+      - master
     tags:
       - '*'
       - '!v*.*.*'