diff --git a/requirements/base.txt b/requirements/base.txt
index 3b014ce6f..875a8e4e0 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,6 +1,6 @@
 httpx>=0.19.0
 jinja2>=2.11.2
-pydantic>=1.8.0
+pydantic>=1.8.0, < 2.0.0
 click>=7.1.2
 python-dotenv>=0.12.0
 typing-extensions>=4.0.1