diff --git a/requirements.txt b/requirements.txt
index 4d49848..d3091a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+ninja==1.11.1.1
 numpy==1.26.4
 onnxconverter-common==1.14.0
 OpenCC==1.1.6