diff --git a/scripts/breaking_changes_checker/dev_requirements.txt b/scripts/breaking_changes_checker/dev_requirements.txt
index 1a547b37f0c8..1397d91553b4 100644
--- a/scripts/breaking_changes_checker/dev_requirements.txt
+++ b/scripts/breaking_changes_checker/dev_requirements.txt
@@ -1,2 +1,3 @@
 -e ../../eng/tools/azure-sdk-tools
 jsondiff>=1.2.0
+six