diff --git a/pyproject.toml b/pyproject.toml
index 8356b3f..9f873ac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ dependencies = [
     "lxml>=4.5",
     "mokapot>=0.10",
     "ms2pip>=4.0.0",
-    "ms2rescore_rs>=0.3.0",
+    "ms2rescore_rs>=0.4.0",
     "numpy>=1.25",
     "pandas>=1",
     "plotly>=5",