diff --git a/cvat/requirements/testing.txt b/cvat/requirements/testing.txt
index 356645815f2..25e85bb3a30 100644
--- a/cvat/requirements/testing.txt
+++ b/cvat/requirements/testing.txt
@@ -2,5 +2,5 @@
 fakeredis==1.4.1
 # Fix dependencies for fakeredis 1.1.0
 # Pip will not reinstall six package if it is installed already
-six==1.12.0
+six==1.15.0
 coveralls
\ No newline at end of file