diff --git a/examples/cookbook-plain/requirements.txt b/examples/cookbook-plain/requirements.txt
index beed53b..abbe96b 100644
--- a/examples/cookbook-plain/requirements.txt
+++ b/examples/cookbook-plain/requirements.txt
@@ -1,4 +1,4 @@
-graphene
-graphene-django
-graphql-core>=2.1rc1
-django==2.2.8
+graphene>=2.1,<3
+graphene-django>=2.1,<3
+graphql-core>=2.1,<3
+django==3.0
diff --git a/examples/cookbook/requirements.txt b/examples/cookbook/requirements.txt
index b1baa57..c062358 100644
--- a/examples/cookbook/requirements.txt
+++ b/examples/cookbook/requirements.txt
@@ -1,5 +1,5 @@
-graphene
-graphene-django
-graphql-core>=2.1rc1
+graphene>=2.1,<3
+graphene-django>=2.1,<3
+graphql-core>=2.1,<3
 django==3.0
 django-filter>=2