diff --git a/poetry.lock b/poetry.lock
index ce6226e..2cb9ce6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -656,13 +656,13 @@ tests = ["pytest", "pytest-cov", "pytest-lazy-fixture"]
 
 [[package]]
 name = "prometheus-client"
-version = "0.17.1"
+version = "0.19.0"
 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-0.19.0-py3-none-any.whl", hash = "sha256:c88b1e6ecf6b41cd8fb5731c7ae919bf66df6ec6fafa555cd6c0e16ca169ae92"},
+    {file = "prometheus_client-0.19.0.tar.gz", hash = "sha256:4585b0d1223148c27a225b10dbec5ae9bc4c81a99a3fa80774fa6209935324e1"},
 ]
 
 [package.extras]
@@ -1177,4 +1177,4 @@ testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "8478ab0e6b5eb4c4df2234c6a10e5fe3a1273fd58e94e84eefae7b5891a2b4ae"
+content-hash = "0e925cf3d13fd1ece5db2a3860f372b039ed7c1b0991785c7a25e8de31d9906b"
diff --git a/pyproject.toml b/pyproject.toml
index 7503697..d20c911 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ openmldb-exporter = "openmldb_exporter.exporter:main"
 
 [tool.poetry.dependencies]
 python = "^3.8"
-prometheus-client = ">=0.16,<0.18"
+prometheus-client = ">=0.16,<0.20"
 openmldb = "^0.8.0"
 # uncomment below to use openmldb sdk built from source
 # set develop = true so changes in python will take effect immediately