diff --git a/packages/web_framework/requirements.txt b/packages/web_framework/requirements.txt
index 05c58cdd6ff..7f1ec9f035f 100644
--- a/packages/web_framework/requirements.txt
+++ b/packages/web_framework/requirements.txt
@@ -4,7 +4,7 @@ galaxy-util
 galaxy-web-stack
 MarkupSafe
 paste
-pydantic
+pydantic<1.8
 requests
 Routes
 six