diff --git a/monitoring/monitorlib/auth_validation.py b/monitoring/monitorlib/auth_validation.py
index c066cfd55e..4ba7ab7b27 100644
--- a/monitoring/monitorlib/auth_validation.py
+++ b/monitoring/monitorlib/auth_validation.py
@@ -11,7 +11,7 @@
 class Authorization(NamedTuple):
     client_id: str
     scopes: list[str]
-    issuer: str
+    issuer: str | None
 
 
 class InvalidScopeError(Exception):
@@ -99,6 +99,7 @@ def wrapper(*args, **kwargs):
                         client_id = (
                             r["client_id"] if "client_id" in r else r.get("sub", None)
                         )
+                        assert isinstance(client_id, str)
                     except jwt.ImmatureSignatureError:
                         raise InvalidAccessTokenError("Access token is immature.")
                     except jwt.ExpiredSignatureError:
@@ -114,6 +115,7 @@ def wrapper(*args, **kwargs):
                             f"Unexpected InvalidTokenError: {str(e)}"
                         )
                     issuer = r.get("iss", None)
+                    assert isinstance(issuer, str) or issuer is None
                     flask.request.jwt = Authorization(
                         client_id, provided_scopes, issuer
                     )
diff --git a/uv.lock b/uv.lock
index 2c84c0404d..9999261fb1 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1280,11 +1280,11 @@ wheels = [
 
 [[package]]
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-version = "0.6.2"
+version = "0.6.3"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/fe/b6/6e630dff89739fcd427e3f72b3d905ce0acb85a45d4ec3e2678718a3487f/pyasn1-0.6.2.tar.gz", hash = "sha256:9b59a2b25ba7e4f8197db7686c09fb33e658b98339fadb826e9512629017833b", size = 146586, upload-time = "2026-01-16T18:04:18.534Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/5c/5f/6583902b6f79b399c9c40674ac384fd9cd77805f9e6205075f828ef11fb2/pyasn1-0.6.3.tar.gz", hash = "sha256:697a8ecd6d98891189184ca1fa05d1bb00e2f84b5977c481452050549c8a72cf", size = 148685, upload-time = "2026-03-17T01:06:53.382Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/44/b5/a96872e5184f354da9c84ae119971a0a4c221fe9b27a4d94bd43f2596727/pyasn1-0.6.2-py3-none-any.whl", hash = "sha256:1eb26d860996a18e9b6ed05e7aae0e9fc21619fcee6af91cca9bad4fbea224bf", size = 83371, upload-time = "2026-01-16T18:04:17.174Z" },
+    { url = "https://files.pythonhosted.org/packages/5d/a0/7d793dce3fa811fe047d6ae2431c672364b462850c6235ae306c0efd025f/pyasn1-0.6.3-py3-none-any.whl", hash = "sha256:a80184d120f0864a52a073acc6fc642847d0be408e7c7252f31390c0f4eadcde", size = 83997, upload-time = "2026-03-17T01:06:52.036Z" },
 ]
 
 [[package]]
@@ -1319,11 +1319,11 @@ wheels = [
 
 [[package]]
 name = "pyjwt"
-version = "2.10.1"
+version = "2.12.1"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/e7/46/bd74733ff231675599650d3e47f361794b22ef3e3770998dda30d3b63726/pyjwt-2.10.1.tar.gz", hash = "sha256:3cc5772eb20009233caf06e9d8a0577824723b44e6648ee0a2aedb6cf9381953", size = 87785, upload-time = "2024-11-28T03:43:29.933Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/c2/27/a3b6e5bf6ff856d2509292e95c8f57f0df7017cf5394921fc4e4ef40308a/pyjwt-2.12.1.tar.gz", hash = "sha256:c74a7a2adf861c04d002db713dd85f84beb242228e671280bf709d765b03672b", size = 102564, upload-time = "2026-03-13T19:27:37.25Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/61/ad/689f02752eeec26aed679477e80e632ef1b682313be70793d798c1d5fc8f/PyJWT-2.10.1-py3-none-any.whl", hash = "sha256:dcdd193e30abefd5debf142f9adfcdd2b58004e644f25406ffaebd50bd98dacb", size = 22997, upload-time = "2024-11-28T03:43:27.893Z" },
+    { url = "https://files.pythonhosted.org/packages/e5/7a/8dd906bd22e79e47397a61742927f6747fe93242ef86645ee9092e610244/pyjwt-2.12.1-py3-none-any.whl", hash = "sha256:28ca37c070cad8ba8cd9790cd940535d40274d22f80ab87f3ac6a713e6e8454c", size = 29726, upload-time = "2026-03-13T19:27:35.677Z" },
 ]
 
 [[package]]
@@ -1340,14 +1340,14 @@ wheels = [
 
 [[package]]
 name = "pyopenssl"
-version = "25.3.0"
+version = "26.0.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "cryptography" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/80/be/97b83a464498a79103036bc74d1038df4a7ef0e402cfaf4d5e113fb14759/pyopenssl-25.3.0.tar.gz", hash = "sha256:c981cb0a3fd84e8602d7afc209522773b94c1c2446a3c710a75b06fe1beae329", size = 184073, upload-time = "2025-09-17T00:32:21.037Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/8e/11/a62e1d33b373da2b2c2cd9eb508147871c80f12b1cacde3c5d314922afdd/pyopenssl-26.0.0.tar.gz", hash = "sha256:f293934e52936f2e3413b89c6ce36df66a0b34ae1ea3a053b8c5020ff2f513fc", size = 185534, upload-time = "2026-03-15T14:28:26.353Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d1/81/ef2b1dfd1862567d573a4fdbc9f969067621764fbb74338496840a1d2977/pyopenssl-25.3.0-py3-none-any.whl", hash = "sha256:1fda6fc034d5e3d179d39e59c1895c9faeaf40a79de5fc4cbbfbe0d36f4a77b6", size = 57268, upload-time = "2025-09-17T00:32:19.474Z" },
+    { url = "https://files.pythonhosted.org/packages/fb/7d/d4f7d908fa8415571771b30669251d57c3cf313b36a856e6d7548ae01619/pyopenssl-26.0.0-py3-none-any.whl", hash = "sha256:df94d28498848b98cc1c0ffb8ef1e71e40210d3b0a8064c9d29571ed2904bf81", size = 57969, upload-time = "2026-03-15T14:28:24.864Z" },
 ]
 
 [[package]]