diff --git a/requirements.txt b/requirements.txt
index b051677b..ce6531bd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,4 @@ psutil
 six
 typing; python_version < '3.8'
 typing_extensions; python_version < '3.8'
+enum34; python_version < '3.4'
\ No newline at end of file