diff --git a/codekit/versiondb.py b/codekit/versiondb.py
index 3a4a03b..060bb3b 100644
--- a/codekit/versiondb.py
+++ b/codekit/versiondb.py
@@ -8,7 +8,7 @@
 import textwrap
 
 default_base_url =\
-    'https://raw.githubusercontent.com/lsst/versiondb/master/manifests'
+    'https://raw.githubusercontent.com/lsst/versiondb/main/manifests'
 
 
 @public
@@ -39,7 +39,7 @@ class Manifest(object):
         Base url to the path for `manifest` files`. Optional.
 
         Eg.:
-            `https://raw.githubusercontent.com/lsst/versiondb/master/manifests`
+            `https://raw.githubusercontent.com/lsst/versiondb/main/manifests`
     """
 
     def __init__(self, name, base_url=None):
diff --git a/tests/versiondb/test_manifest.py b/tests/versiondb/test_manifest.py
index 2a2b18f..70fcf72 100644
--- a/tests/versiondb/test_manifest.py
+++ b/tests/versiondb/test_manifest.py
@@ -35,7 +35,7 @@ def test_b3504(b3504):
         responses.Response(
             method='GET',
             url='https://raw.githubusercontent.com/lsst/versiondb'
-                '/master/manifests/b3504.txt',
+                '/main/manifests/b3504.txt',
             body=b3504,
         ),
     )