diff --git a/requirements_dev.txt b/requirements_dev.txt
index ae557238..638351b2 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -64,7 +64,7 @@ prompt-toolkit==1.0.15    # via ipython
 ptyprocess==0.6.0         # via pexpect
 pur==5.0.0
 py-cpuinfo==4.0.0         # via pytest-benchmark
-py==1.5.4                 # via pytest, tox
+py==1.8.1                 # via pytest, tox
 pycodestyle==2.3.1        # via flake8
 pycparser==2.18           # via cffi
 pydocstyle==2.1.1
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index b073e303..aa160a65 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -58,7 +58,7 @@ plumbum==1.6.6            # via rpyc
 prompt-toolkit==1.0.15    # via ipython
 ptyprocess==0.6.0         # via pexpect
 py-cpuinfo==4.0.0         # via pytest-benchmark
-py==1.5.4                 # via pytest
+py==1.8.1                 # via pytest
 pycodestyle==2.3.1        # via flake8
 pycparser==2.18           # via cffi
 pydocstyle==2.1.1
diff --git a/requirements_test_experimental.txt b/requirements_test_experimental.txt
index f0e51ce2..de30b443 100644
--- a/requirements_test_experimental.txt
+++ b/requirements_test_experimental.txt
@@ -22,7 +22,7 @@ prompt-toolkit==1.0.15    # via ipython, ptpdb, ptpython
 ptpdb==0.17
 ptpython==0.33
 ptyprocess==0.6.0         # via pexpect
-py==1.5.4                 # via pytest
+py==1.8.1                 # via pytest
 pydocstyle==2.1.1
 pygments==2.2.0           # via ipython, ptpython
 pympler==0.5