diff --git a/poetry.lock b/poetry.lock
index a0a5267..dba4a74 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -578,13 +578,13 @@ testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "prometheus-client"
-version = "0.21.0"
+version = "0.21.1"
 description = "Python client for the Prometheus monitoring system."
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "prometheus_client-0.21.0-py3-none-any.whl", hash = "sha256:4fa6b4dd0ac16d58bb587c04b1caae65b8c5043e85f778f42f5f632f6af2e166"},
-    {file = "prometheus_client-0.21.0.tar.gz", hash = "sha256:96c83c606b71ff2b0a433c98889d275f51ffec6c5e267de37c7a2b5c9aa9233e"},
+    {file = "prometheus_client-0.21.1-py3-none-any.whl", hash = "sha256:594b45c410d6f4f8888940fe80b5cc2521b305a1fafe1c58609ef715a001f301"},
+    {file = "prometheus_client-0.21.1.tar.gz", hash = "sha256:252505a722ac04b0456be05c05f75f45d760c2911ffc45f2a06bcaed9f3ae3fb"},
 ]
 
 [package.extras]
@@ -725,4 +725,4 @@ zstd = ["zstandard (>=0.18.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "c42702b6a137edbe822f127c79676c9d8b9d2506d31977eb6205405e6d5feef3"
+content-hash = "5887e1ed22c6d415b00806a5ad0453d2938e72084b297b418b9c395bec59d7cb"
diff --git a/pyproject.toml b/pyproject.toml
index 1e0cba4..d20b671 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ click = "*"
 gcn-kafka = "^0.3.3"
 python = "^3.9"
 pygcn = "*"
-prometheus-client = "^0.21.0"
+prometheus-client = "^0.21.1"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "*"