diff --git a/requirements.txt b/requirements.txt
index dd74b56..426796c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ matplotlib==2.0.2
 mypy==0.511
 mypy-lang==0.4.6
 packaging==16.8
-py==1.4.34
+py==1.10.0
 Pygments==2.2.0
 pymitter==0.2.3
 pyparsing==2.2.0