diff --git a/shopify_python/google_styleguide.py b/shopify_python/google_styleguide.py
index f4ba3cf..d32c9b3 100644
--- a/shopify_python/google_styleguide.py
+++ b/shopify_python/google_styleguide.py
@@ -34,32 +34,32 @@ class GoogleStyleGuideChecker(checkers.BaseChecker):
     name = 'google-styleguide-checker'
 
     msgs = {
-        'C2601': ('%(child)s is not a module or cannot be imported',
+        'C6001': ('%(child)s is not a module or cannot be imported',
                   'import-modules-only',
                   'Only import packages or modules and ensure that they are installed.'),
-        'C2602': ('%(module)s imported relatively',
+        'C6002': ('%(module)s imported relatively',
                   'import-full-path',
                   'Import modules using their absolute names.'),
-        'C2603': ('%(name)s declared at the module level (i.e. global)',
+        'C6003': ('%(name)s declared at the module level (i.e. global)',
                   'global-variable',
                   'Avoid global variables in favor of class variables.'),
-        'C2604': ('Raised two-argument exception',
+        'C6004': ('Raised two-argument exception',
                   'two-arg-exception',
                   "Use either raise Exception('message') or raise Exception."),
-        'C2605': ('Raised deprecated string-exception',
+        'C6005': ('Raised deprecated string-exception',
                   'string-exception',
                   "Use either raise Exception('message') or raise Exception."),
-        'C2606': ('Caught StandardError',
+        'C6006': ('Caught StandardError',
                   'catch-standard-error',
                   "Don't catch StandardError."),
-        'C2607': ('Try body has %(found)i nodes',
+        'C6007': ('Try body has %(found)i nodes',
                   'try-too-long',
                   "The larger the 'try' body size, the more likely that an unexpected exception will be raised."),
-        'C2608': ('Except body has %(found)i nodes',
+        'C6008': ('Except body has %(found)i nodes',
                   'except-too-long',
                   "The larger the 'except' body size, the more likely that an exception will be raised during "
                   "exception handling."),
-        'C2609': ('Finally body has %(found)i nodes',
+        'C6009': ('Finally body has %(found)i nodes',
                   'finally-too-long',
                   "The larger the 'finally' body size, the more likely that an exception will be raised during "
                   "resource cleanup activities."),