diff --git a/pyproject.toml b/pyproject.toml
index 844a0277a9..eedc5017c3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,8 @@ speed = [
     "orjson>=3.5.4",
     "aiodns>=1.1",
     "Brotlipy",
-    "cchardet",
+    # cchardet does not support 3.10+, see https://github.com/PyYoshi/cChardet/pull/78
+    "cchardet>=2.1.5,<=2.1.7; python_version<'3.10'",
 ]
 
 [tool.setuptools]