diff --git a/default.xml b/default.xml
index 767415de..61f3424e 100644
--- a/default.xml
+++ b/default.xml
@@ -2,7 +2,7 @@
 <!-- AUTOGENERATED BY deps-to-manifest.py; DO NOT EDIT -->
 <manifest>
 
-  <default revision='refs/heads/master'
+  <default revision='refs/heads/main'
            remote='chromium'
            sync-c='true'
            sync-j='8' />
@@ -17,7 +17,7 @@
 
   <project path='src'
            name='breakpad/breakpad'
-           revision='refs/heads/master'
+           revision='refs/heads/main'
            remote='chromium' />
 
   <project path='src/src/tools/gyp'
diff --git a/src/tools/python/deps-to-manifest.py b/src/tools/python/deps-to-manifest.py
index b4562854..2a9e1bda 100755
--- a/src/tools/python/deps-to-manifest.py
+++ b/src/tools/python/deps-to-manifest.py
@@ -49,7 +49,7 @@ MANIFEST_HEAD = """<?xml version='1.0' encoding='UTF-8'?>
 <!-- AUTOGENERATED BY %(prog)s; DO NOT EDIT -->
 <manifest>
 
-  <default revision='refs/heads/master'
+  <default revision='refs/heads/main'
            remote='chromium'
            sync-c='true'
            sync-j='8' />
@@ -100,7 +100,7 @@ def ConvertDepsToManifest(deps, manifest):
   data = {
       'path': 'src',
       'name': 'breakpad/breakpad',
-      'revision': 'refs/heads/master',
+      'revision': 'refs/heads/main',
       'remote': 'chromium',
   }
   new_contents += MANIFEST_PROJECT % data