diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index d57c35b81f0..5c2d1ad2ffb 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -5,11 +5,25 @@ resources:
     # - container: ubuntu_1604_arm64_cross_container
     #   image: microsoft/dotnet-buildtools-prereqs:ubuntu-16.04-cross-arm64-a3ae44b-20180315221921
 
+# CI Trigger on master branch
 trigger:
-- master
+  branches:
+    include:
+    - master
+  paths:
+    exclude: # don't trigger the CI if only a doc file was changed
+    - docs/*
+    - '**/*.md'
 
+# Trigger builds for PR's targeting master
 pr:
-- master
+  branches:
+    include:
+    - master
+  paths:
+    exclude: # don't trigger the CI if only a doc file was changed
+    - docs/*
+    - '**/*.md'
 
 jobs: