diff --git a/dev_requirements.txt b/dev_requirements.txt
index d84528d..c797536 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -20,7 +20,7 @@ MarkupSafe==1.0
 packaging==20.0
 pathtools==0.1.2
 pipdeptree==0.10.1
-py==1.4.34
+py==1.10.0
 Pygments==2.5.2
 PyHamcrest==1.9.0
 pyparsing==2.4.6
diff --git a/requirements.txt b/requirements.txt
index 8da2c22..51da05b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ incremental==17.5.0
 Jinja2==2.11.2
 MarkupSafe==1.0
 pipdeptree==0.10.1
-py==1.4.34
+py==1.10.0
 PyHamcrest==1.9.0
 six==1.11.0
 Twisted==20.3.0