diff --git a/pyproject.toml b/pyproject.toml
index 8137542..008e0da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ dependencies = [
     "tornado>=6.0.2,<7",
     "bcrypt>=3.1.6,<4",
     "geoip2>=2.9.0,<3",
-    "prometheus-client>=0.6.0,<0.7",
+    "prometheus-client>=0.22.1,<0.23",
 ]
 
 [project.scripts]
diff --git a/uv.lock b/uv.lock
index 72ced79..19b411e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -271,7 +271,7 @@ dev = [
 requires-dist = [
     { name = "bcrypt", specifier = ">=3.1.6,<4" },
     { name = "geoip2", specifier = ">=2.9.0,<3" },
-    { name = "prometheus-client", specifier = ">=0.6.0,<0.7" },
+    { name = "prometheus-client", specifier = ">=0.22.1,<0.23" },
     { name = "tornado", specifier = ">=6.0.2,<7" },
 ]
 
@@ -324,9 +324,12 @@ wheels = [
 
 [[package]]
 name = "prometheus-client"
-version = "0.6.0"
+version = "0.22.1"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/4c/bd/b42db3ec90ffc6be805aad09c1cea4bb13a620d0cd4b21aaa44d13541d71/prometheus_client-0.6.0.tar.gz", hash = "sha256:1b38b958750f66f208bcd9ab92a633c0c994d8859c831f7abc1f46724fcee490", size = 36583, upload-time = "2019-02-19T16:30:25.167Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/5e/cf/40dde0a2be27cc1eb41e333d1a674a74ce8b8b0457269cc640fd42b07cf7/prometheus_client-0.22.1.tar.gz", hash = "sha256:190f1331e783cf21eb60bca559354e0a4d4378facecf78f5428c39b675d20d28", size = 69746, upload-time = "2025-06-02T14:29:01.152Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/32/ae/ec06af4fe3ee72d16973474f122541746196aaa16cea6f66d18b963c6177/prometheus_client-0.22.1-py3-none-any.whl", hash = "sha256:cca895342e308174341b2cbf99a56bef291fbc0ef7b9e5412a0f26d653ba7094", size = 58694, upload-time = "2025-06-02T14:29:00.068Z" },
+]
 
 [[package]]
 name = "pycparser"