diff --git a/requirements_dev.txt b/requirements_dev.txt
old mode 100755
new mode 100644
index d29c360..5cd6053
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,4 +1,4 @@
-pip==9.0.1
+pip==21.1
 bumpversion==0.5.3
 wheel==0.30.0
 watchdog==0.8.3