diff --git a/tox.ini b/tox.ini
index 49998c984e..2110bd2b58 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,7 @@ deps =
     pytest-dependency
     httpcore==0.11.*
     httpx==0.15.4
-    chardet==3.*
+    multidict>=5.0,<6.0
     beautifulsoup4
     gunicorn==20.0.4
     uvicorn