diff --git a/requirement.txt b/requirement.txt
index 1d89496..b128554 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -11,6 +11,7 @@ langchain-openai==1.1.12
 langchain-qdrant==1.1.0
 langgraph==1.1.6
 langgraph-checkpoint-postgres==3.0.5
+tiktoken>=0.12.0
 
 # Vector DB
 qdrant-client==1.17.1