diff --git a/requirements.txt b/requirements.txt
index 572b352..b005f6e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-pydantic
+pydantic<1
diff --git a/setup.py b/setup.py
index eb766b5..54449b0 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@ setup(
     python_requires='>=3.6',
 
     install_requires=[
-        'pydantic',
+        'pydantic<1',
     ],
 
     extras_require={