diff --git a/pyproject.toml b/pyproject.toml
index 072fb86b..ec6634c2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ dynaconf = "^3.1.12"
 loguru = ">=0.6.0"
 httpx = ">=0.24.1"
 js2py = "^0.74"
-g4f = "^0.0.2.6"
+g4f = ">=0.0.2.6,<0.0.4.0"
 langchain = "^0.0.292"
 nest_asyncio = "*"