diff --git a/langchain/chat_models/openai.py b/langchain/chat_models/openai.py
index f31d3931..eb4b0315 100644
--- a/langchain/chat_models/openai.py
+++ b/langchain/chat_models/openai.py
@@ -327,8 +327,8 @@ class ChatOpenAI(BaseChatModel):
 
     def get_num_tokens(self, text: str) -> int:
         """Calculate num tokens with tiktoken package."""
-        # tiktoken NOT supported for Python 3.8 or below
-        if sys.version_info[1] <= 8:
+        # tiktoken NOT supported for Python 3.7 or below
+        if sys.version_info[1] <= 7:
             return super().get_num_tokens(text)
         try:
             import tiktoken