diff --git a/pyproject.toml b/pyproject.toml
index f1d5d22d80da6eaed0da382afff7be66300847ff..8a805927a47111ad797aca5dc9e8f9cf8cffdcc7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ dependencies = [
   "Pillow>=9.2.0",
   "pandas>=1.4.0",
   "papermill>=2.4.0",
-  "ogs>=6.5.1.dev0",
+  "ogs>=6.5.1",
   "ogs6py>=0.370",
   "tqdm>=4.60",
   "typeguard>=4.0.0",