diff --git a/pyproject.toml b/pyproject.toml
index e575a47e37..551e4887c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,7 @@ classifiers = [
 dependencies = [
     "SQLAlchemy >=2.0.14,<2.1.0",
     "pydantic>=2.11.0",
+    "typing-extensions>=4.5.0",
 ]
 
 [project.urls]
diff --git a/uv.lock b/uv.lock
index 8297e3e78d..fe200743ea 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1954,6 +1954,7 @@ source = { editable = "." }
 dependencies = [
     { name = "pydantic" },
     { name = "sqlalchemy" },
+    { name = "typing-extensions" },
 ]
 
 [package.dev-dependencies]
@@ -2023,6 +2024,7 @@ tests = [
 requires-dist = [
     { name = "pydantic", specifier = ">=2.11.0" },
     { name = "sqlalchemy", specifier = ">=2.0.14,<2.1.0" },
+    { name = "typing-extensions", specifier = ">=4.5.0" },
 ]
 
 [package.metadata.requires-dev]