diff --git a/litellm/integrations/langfuse/langfuse.py b/litellm/integrations/langfuse/langfuse.py
index 9624da5fccc..37685b582c6 100644
--- a/litellm/integrations/langfuse/langfuse.py
+++ b/litellm/integrations/langfuse/langfuse.py
@@ -140,7 +140,7 @@ class LangFuseLogger:
         langfuse_public_key=None,
         langfuse_secret=None,
         langfuse_host=None,
-        langfuse_environment=None,
+        langfuse_environment: str | None = None,
         flush_interval=1,
         allow_env_credentials: bool = True,
     ):