diff --git a/requirements-dev.txt b/requirements-dev.txt
index 74996a2..ae4bcfc 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
-pytest==6.1.2
-pytest-cov==2.10.1
-pytest-parallel==0.1.0
-flake8==3.8.3
-black==20.8b0
+pytest==6.2.5
+pytest-cov==3.0.0
+pytest-parallel==0.1.1
+flake8==4.0.1
+black==21.12b0