diff --git a/poetry.lock b/poetry.lock
index 942e3b7..ad766b6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -36,7 +36,7 @@ python-versions = ">=3.5"
 dev = ["cloudpickle", "coverage[toml] (>=5.0.2)", "furo", "hypothesis", "mypy (>=0.900,!=0.940)", "pre-commit", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "sphinx", "sphinx-notfound-page", "zope.interface"]
 docs = ["furo", "sphinx", "sphinx-notfound-page", "zope.interface"]
 tests = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "mypy (>=0.900,!=0.940)", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "zope.interface"]
-tests_no_zope = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "mypy (>=0.900,!=0.940)", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins"]
+tests-no-zope = ["cloudpickle", "coverage[toml] (>=5.0.2)", "hypothesis", "mypy (>=0.900,!=0.940)", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins"]
 
 [[package]]
 name = "bandit"
@@ -74,7 +74,7 @@ optional = false
 python-versions = ">=3.6.0"
 
 [package.extras]
-unicode_backport = ["unicodedata2"]
+unicode-backport = ["unicodedata2"]
 
 [[package]]
 name = "colorama"
@@ -329,9 +329,9 @@ python-versions = ">=3.6.1,<4.0"
 
 [package.extras]
 colors = ["colorama (>=0.4.3,<0.5.0)"]
-pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
+pipfile-deprecated-finder = ["pipreqs", "requirementslib"]
 plugins = ["setuptools"]
-requirements_deprecated_finder = ["pip-api", "pipreqs"]
+requirements-deprecated-finder = ["pip-api", "pipreqs"]
 
 [[package]]
 name = "jsonschema"
@@ -444,7 +444,7 @@ testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "prometheus-client"
-version = "0.14.1"
+version = "0.15.0"
 description = "Python client for the Prometheus monitoring system."
 category = "main"
 optional = false
@@ -611,7 +611,7 @@ urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
 socks = ["PySocks (>=1.5.6,!=1.5.7)"]
-use_chardet_on_py3 = ["chardet (>=3.0.2,<6)"]
+use-chardet-on-py3 = ["chardet (>=3.0.2,<6)"]
 
 [[package]]
 name = "ruamel.yaml"
@@ -745,7 +745,7 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=6)", "pytest-black (>=
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7.0"
-content-hash = "542f3a63ac4f62b7f8c52e5849024a71d1ca5c4227c44c840c4ed4da78868377"
+content-hash = "eb5ede6cd1ac3b0fb7940d6e80083fbac57e80aed11ede84d6762417169e670f"
 
 [metadata.files]
 anyconfig = [
@@ -937,8 +937,8 @@ pluggy = [
     {file = "pluggy-1.0.0.tar.gz", hash = "sha256:4224373bacce55f955a878bf9cfa763c1e360858e330072059e10bad68531159"},
 ]
 prometheus-client = [
-    {file = "prometheus_client-0.14.1-py3-none-any.whl", hash = "sha256:522fded625282822a89e2773452f42df14b5a8e84a86433e3f8a189c1d54dc01"},
-    {file = "prometheus_client-0.14.1.tar.gz", hash = "sha256:5459c427624961076277fdc6dc50540e2bacb98eebde99886e59ec55ed92093a"},
+    {file = "prometheus_client-0.15.0-py3-none-any.whl", hash = "sha256:db7c05cbd13a0f79975592d112320f2605a325969b270a94b71dcabc47b931d2"},
+    {file = "prometheus_client-0.15.0.tar.gz", hash = "sha256:be26aa452490cfcf6da953f9436e95a9f2b4d578ca80094b4458930e5f584ab1"},
 ]
 proxmoxer = [
     {file = "proxmoxer-1.3.1-py3-none-any.whl", hash = "sha256:ac4449cb754a4d7a1a6f6a110de7d903c742ee023c127ee7de47fcea2a37b802"},
diff --git a/pyproject.toml b/pyproject.toml
index 8153031..d1087ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ colorama = "0.4.5"
 environs = "9.5.0"
 jsonschema = "4.16.0"
 nested-lookup = "0.2.25"
-prometheus-client = "0.14.1"
+prometheus-client = "0.15.0"
 proxmoxer = "1.3.1"
 python = "^3.7.0"
 python-json-logger = "2.0.4"