diff --git a/requirements-dev.txt b/requirements-dev.txt
index a0578755..1e92dae0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,6 @@
 coverage==4.5.4
 flake8==3.7.9
-mock
-pre-commit
-pytest
+mock==4.0.3
+pre-commit==2.15.0
+pytest==6.2.5
 requirements-tools==1.2.4