diff --git a/ci/pip_requirements.txt b/ci/pip_requirements.txt
index 0cb7c272b..08b546e66 100644
--- a/ci/pip_requirements.txt
+++ b/ci/pip_requirements.txt
@@ -1,4 +1,5 @@
 openapi-spec-validator < 0.2.10
+swagger-ui-bundle=0.0.9
 connexion[swagger-ui] < 2.7.1
 jsonschema < 4.0.0
 pyjwt[crypto] < 2.2.0