diff --git a/requirements/dev-py36.txt b/requirements/dev-py36.txt
index 8567cdf..e339295 100644
--- a/requirements/dev-py36.txt
+++ b/requirements/dev-py36.txt
@@ -58,7 +58,7 @@ pre-commit==2.7.1         # via -r requirements/dev.in
 prompt-toolkit==3.0.7     # via ipython
 psycopg2-binary==2.8.6    # via -r requirements/dev.in, small-small-hr
 ptyprocess==0.6.0         # via pexpect
-py==1.9.0                 # via tox
+py==1.10.0                 # via tox
 pycodestyle==2.6.0        # via -r requirements/dev.in, autopep8, flake8
 pydocstyle==5.1.1         # via -r requirements/dev.in
 pyflakes==2.2.0           # via flake8
diff --git a/requirements/dev-py37.txt b/requirements/dev-py37.txt
index 2b14202..8a1d96f 100644
--- a/requirements/dev-py37.txt
+++ b/requirements/dev-py37.txt
@@ -56,7 +56,7 @@ pre-commit==2.7.1         # via -r requirements/dev.in
 prompt-toolkit==3.0.7     # via ipython
 psycopg2-binary==2.8.6    # via -r requirements/dev.in, small-small-hr
 ptyprocess==0.6.0         # via pexpect
-py==1.9.0                 # via tox
+py==1.10.0                 # via tox
 pycodestyle==2.6.0        # via -r requirements/dev.in, autopep8, flake8
 pydocstyle==5.1.1         # via -r requirements/dev.in
 pyflakes==2.2.0           # via flake8
diff --git a/requirements/dev-py38.txt b/requirements/dev-py38.txt
index 99ff79d..429309a 100644
--- a/requirements/dev-py38.txt
+++ b/requirements/dev-py38.txt
@@ -55,7 +55,7 @@ pre-commit==2.7.1         # via -r requirements/dev.in
 prompt-toolkit==3.0.7     # via ipython
 psycopg2-binary==2.8.6    # via -r requirements/dev.in, small-small-hr
 ptyprocess==0.6.0         # via pexpect
-py==1.9.0                 # via tox
+py==1.10.0                 # via tox
 pycodestyle==2.6.0        # via -r requirements/dev.in, autopep8, flake8
 pydocstyle==5.1.1         # via -r requirements/dev.in
 pyflakes==2.2.0           # via flake8