diff --git a/pyproject.toml b/pyproject.toml
index 3651b131..8ca42778 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,7 @@ dependencies = [
     "seaborn",
     "python-dotenv",
     "jq",
+    "sentencepiece",
     "tabulate",
 ]