diff --git a/requirements_dev.txt b/requirements_dev.txt
index 53a3f2f..53dbf2a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,9 +1,9 @@
-wheel==0.35.1
+wheel==0.36.2
 flake8==3.8.4
-tox==3.20.1
-coverage==5.3
-coveralls==2.1.2
-pytest==6.1.2
-pytest-cov==2.10.1
+tox==3.21.3
+coverage==5.4
+coveralls==3.0.0
+pytest==6.2.2
+pytest-cov==2.11.1
 pytest-runner==5.2
-twine==3.2.0
+twine==3.3.0