diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@ def readme():
 
 base_requirements = [
     'attrs>=17.4,<20',
-    'conformity~=1.20',
+    'conformity~=1.21',
     'currint~=1.6',
     'enum34;python_version<"3.4"',
     'msgpack-python~=0.5,>=0.5.2',
[MINOR] Bump Conformity to <I>