diff --git a/pyproject.toml b/pyproject.toml
index 926256a6..66b6f32d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ classifiers = [
   "Topic :: Software Development :: Libraries :: Python Modules",
 ]
 dependencies = [
-  "graphql-core>=3.2.0,<3.3",
+  "graphql-core>=3.2.0,<3.2.6",
   "starlette>0.17,<1.0",
   "typing_extensions>=3.6.0",
 ]