diff --git a/backend/requirements.txt b/backend/requirements.txt
index 1a04cfcb2..34a2f0ec0 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -31,6 +31,7 @@ APScheduler==3.10.4
 openai
 anthropic
 google-generativeai==0.5.4
+tiktoken
 
 langchain==0.2.6
 langchain-community==0.2.6