diff --git a/samples/1simple/requirements.txt b/samples/1simple/requirements.txt
index 6b0b939..f39e63b 100644
--- a/samples/1simple/requirements.txt
+++ b/samples/1simple/requirements.txt
@@ -1 +1,2 @@
 fastapi
+pydantic<2
diff --git a/samples/2classbasedview/requirements.txt b/samples/2classbasedview/requirements.txt
index 072b112..cd02939 100644
--- a/samples/2classbasedview/requirements.txt
+++ b/samples/2classbasedview/requirements.txt
@@ -1,2 +1,3 @@
 fastapi
 classy-fastapi
+pydantic<2