diff --git a/docs/requirements.txt b/docs/requirements.txt
index ca0b8dd..99bbaad 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -15,7 +15,7 @@ packaging==19.0
 pathtools==0.1.2
 pluggy==0.3.1
 port-for==0.3.1
-py==1.4.31
+py==1.10.0
 Pygments==2.1.3
 pyparsing==2.4.0
 pytz==2016.10
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 97af8f1..154afc7 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -14,6 +14,6 @@ pyflakes==2.1.1
 mock==3.0.5
 nose==1.3.7
 pluggy==0.11.0
-py==1.8.0
+py==1.10.0
 pycodestyle==2.5.0
 tox==3.11.0
diff --git a/setup.py b/setup.py
index 5e4eb3d..d2221b0 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
         "mock==2.0.0",
         "nose==1.3.1",
         "pluggy==0.3.1",
-        "py==1.4.31",
+        "py==1.10.0",
         "tox==2.3.1",
     ],
     keywords="brew brewing beer grain hops yeast alcohol",