diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index a593d1b..42df6a9 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -18,6 +18,7 @@ asyncpg = "^0.27.0"
 msgspec = "^0.12.0"
 pyshp = "^2.3.1"
 pyproj = "^3.5.0"
+sqlalchemy-utils = "^0.41.1"
 
 [build-system]
 requires = ["poetry-core"]