diff --git a/requirements_dev.txt b/requirements_dev.txt
index d6ad529..5cf99d0 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,4 +1,4 @@
-pip==9.0.1
+pip==21.1
 wheel==0.30.0
 watchdog==0.8.3
 flake8==3.4.1