diff --git a/code/PrefEval/requirements.txt b/code/PrefEval/requirements.txt
index f3c0b07..5e19962 100644
--- a/code/PrefEval/requirements.txt
+++ b/code/PrefEval/requirements.txt
@@ -77,7 +77,7 @@ safetensors==0.4.5
 scikit-learn==1.5.2
 scipy==1.14.1
 seaborn==0.13.2
-sentencepiece==0.2.0
+sentencepiece==0.2.1
 six==1.16.0
 sniffio==1.3.1
 soupsieve==2.6