diff --git a/requirements.txt b/requirements.txt
index 8bb6b64..e0be314 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ ckcc-protocol>=1.0.1
 pynacl==1.3.0
 aiohttp_session
 click
-pendulum
+pendulum==2.0.3
 pyyaml
 Pillow
 pytest