diff --git a/poetry.lock b/poetry.lock
index 0b1ab01..6dbd101 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -843,13 +843,13 @@ testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "prometheus-client"
-version = "0.20.0"
+version = "0.21.0"
 description = "Python client for the Prometheus monitoring system."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "prometheus_client-0.20.0-py3-none-any.whl", hash = "sha256:cde524a85bce83ca359cc837f28b8c0db5cac7aa653a588fd7e84ba061c329e7"},
-    {file = "prometheus_client-0.20.0.tar.gz", hash = "sha256:287629d00b147a32dcb2be0b9df905da599b2d82f80377083ec8463309a4bb89"},
+    {file = "prometheus_client-0.21.0-py3-none-any.whl", hash = "sha256:4fa6b4dd0ac16d58bb587c04b1caae65b8c5043e85f778f42f5f632f6af2e166"},
+    {file = "prometheus_client-0.21.0.tar.gz", hash = "sha256:96c83c606b71ff2b0a433c98889d275f51ffec6c5e267de37c7a2b5c9aa9233e"},
 ]
 
 [package.extras]
@@ -1240,4 +1240,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "1b317c0f608210a5545b28dd49d7d90f5e7a1c5c309fe496dc98394e59dd5b25"
+content-hash = "0384ec37bd86092dfb55f8ac7a97b1ff6d64e7d6ee0a0a9e5381eac1d8e02aba"
diff --git a/pyproject.toml b/pyproject.toml
index ffded5b..4d70c24 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ python = "^3.9"
 kopf = "^1.36.2"
 requests = "^2.31.0"
 kubernetes = "^30.0.0"
-prometheus-client = "^0.20.0"
+prometheus-client = "^0.21.0"
 aiohttp = "^3.9.3"
 
 [tool.poetry.dev-dependencies]