diff --git a/requirements_dev.txt b/requirements_dev.txt
index b0cb4b6..51c489c 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,6 +1,6 @@
 numpy==1.12.1
 pandas==0.20.1
-pip==9.0.1
+pip==21.1
 bumpversion==0.5.3
 wheel==0.29.0
 watchdog==0.8.3