diff --git a/poetry.lock b/poetry.lock
index b19fd38..204eb12 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -576,13 +576,13 @@ testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "prometheus-client"
-version = "0.17.1"
+version = "0.21.0"
 description = "Python client for the Prometheus monitoring system."
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.8"
 files = [
-    {file = "prometheus_client-0.17.1-py3-none-any.whl", hash = "sha256:e537f37160f6807b8202a6fc4764cdd19bac5480ddd3e0d463c3002b34462101"},
-    {file = "prometheus_client-0.17.1.tar.gz", hash = "sha256:21e674f39831ae3f8acde238afd9a27a37d0d2fb5a28ea094f0ce25d2cbf2091"},
+    {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]
@@ -723,4 +723,4 @@ zstd = ["zstandard (>=0.18.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "b4ae239c9111df63d2eb474825c09b5e68f00568b4410568a1482dece6bbfa76"
+content-hash = "c42702b6a137edbe822f127c79676c9d8b9d2506d31977eb6205405e6d5feef3"
diff --git a/pyproject.toml b/pyproject.toml
index 60f7a2d..1e0cba4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ click = "*"
 gcn-kafka = "^0.3.3"
 python = "^3.9"
 pygcn = "*"
-prometheus-client = "^0.17.0"
+prometheus-client = "^0.21.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "*"