diff --git a/requirements.txt b/requirements.txt
index a29e288..04533f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 attrs==19.1.0
 bitarray==0.9.3
 bleach==3.1.0
-cattrs-3.8==0.9.0
+cattrs-3.8==0.9.1
 certifi==2018.11.29
 chardet==3.0.4
 clint==0.5.1