diff --git a/pyproject.toml b/pyproject.toml
index 1830f4d..2f19554 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,6 +26,7 @@ dependencies = [
     "requests>=2.32.3",
     "scikit-learn>=1.2",
     "typer>=0.12.5",
+    "typing-extensions>=4.4.0",
 ]
 
 [tool.ruff]
diff --git a/uv.lock b/uv.lock
index 694829c..9f51ce3 100644
--- a/uv.lock
+++ b/uv.lock
@@ -813,6 +813,7 @@ dependencies = [
     { name = "requests" },
     { name = "scikit-learn" },
     { name = "typer" },
+    { name = "typing-extensions" },
 ]
 
 [package.optional-dependencies]
@@ -852,6 +853,7 @@ requires-dist = [
     { name = "ruff", marker = "extra == 'dev'", specifier = ">=0.5.0" },
     { name = "scikit-learn", specifier = ">=1.2" },
     { name = "typer", specifier = ">=0.12.5" },
+    { name = "typing-extensions", specifier = ">=4.4.0" },
 ]
 provides-extras = ["dev"]
 
@@ -1275,11 +1277,11 @@ wheels = [
 
 [[package]]
 name = "typing-extensions"
-version = "4.14.1"
+version = "4.15.0"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/98/5a/da40306b885cc8c09109dc2e1abd358d5684b1425678151cdaed4731c822/typing_extensions-4.14.1.tar.gz", hash = "sha256:38b39f4aeeab64884ce9f74c94263ef78f3c22467c8724005483154c26648d36", size = 107673, upload-time = "2025-07-04T13:28:34.16Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/72/94/1a15dd82efb362ac84269196e94cf00f187f7ed21c242792a923cdb1c61f/typing_extensions-4.15.0.tar.gz", hash = "sha256:0cea48d173cc12fa28ecabc3b837ea3cf6f38c6d1136f85cbaaf598984861466", size = 109391, upload-time = "2025-08-25T13:49:26.313Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/b5/00/d631e67a838026495268c2f6884f3711a15a9a2a96cd244fdaea53b823fb/typing_extensions-4.14.1-py3-none-any.whl", hash = "sha256:d1e1e3b58374dc93031d6eda2420a48ea44a36c2b4766a4fdeb3710755731d76", size = 43906, upload-time = "2025-07-04T13:28:32.743Z" },
+    { url = "https://files.pythonhosted.org/packages/18/67/36e9267722cc04a6b9f15c7f3441c2363321a3ea07da7ae0c0707beb2a9c/typing_extensions-4.15.0-py3-none-any.whl", hash = "sha256:f0fa19c6845758ab08074a0cfa8b7aecb71c999ca73d62883bc25cc018c4e548", size = 44614, upload-time = "2025-08-25T13:49:24.86Z" },
 ]
 
 [[package]]