diff --git a/requirements.txt b/requirements.txt
index 25df0c8..a29e288 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 attrs==19.1.0
 bitarray==0.9.3
 bleach==3.1.0
-cattrs==0.9.0
+cattrs-3.8==0.9.0
 certifi==2018.11.29
 chardet==3.0.4
 clint==0.5.1
diff --git a/setup.py b/setup.py
index 137cbe1..2c5d425 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@ setuptools.setup(
         "requests",
         "pybloom-live",
         "attrs",
-        "cattrs",
+        "cattrs-3.8",
         "lxml",
         "pendulum",
         "clint",