diff --git a/requirements_test.txt b/requirements_test.txt
index cdd71fb..037bb04 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,4 +1,4 @@
-pip==9.0.1
+pip==21.1
 wheel==0.30.0
 flake8==3.5.0
 tox==2.9.1