diff --git a/monitoring/AUTHORING_GUIDE.md b/monitoring/AUTHORING_GUIDE.md
index 55c97b32f4c1..8249522ffc2d 100644
--- a/monitoring/AUTHORING_GUIDE.md
+++ b/monitoring/AUTHORING_GUIDE.md
@@ -1 +1 @@
-See https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/AUTHORING_GUIDE.md
\ No newline at end of file
+See https://github.com/GoogleCloudPlatform/python-docs-samples/blob/main/AUTHORING_GUIDE.md
\ No newline at end of file
diff --git a/monitoring/CONTRIBUTING.md b/monitoring/CONTRIBUTING.md
index 34c882b6f1a3..f5fe2e6baf13 100644
--- a/monitoring/CONTRIBUTING.md
+++ b/monitoring/CONTRIBUTING.md
@@ -1 +1 @@
-See https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/CONTRIBUTING.md
\ No newline at end of file
+See https://github.com/GoogleCloudPlatform/python-docs-samples/blob/main/CONTRIBUTING.md
\ No newline at end of file