diff --git a/ci/asan_tests/ray-project/requirements.txt b/ci/asan_tests/ray-project/requirements.txt
index 935c22901..bd3a5b309 100644
--- a/ci/asan_tests/ray-project/requirements.txt
+++ b/ci/asan_tests/ray-project/requirements.txt
@@ -18,7 +18,7 @@ scikit-image
 openpyxl
 pandas==0.24.2
 Pillow
-prometheus_client
+prometheus_client<0.14.0
 py-spy
 pygments
 pytest==5.4.3
diff --git a/python/requirements.txt b/python/requirements.txt
index 47db54c2a..27a17f55a 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -18,7 +18,7 @@ jsonschema
 msgpack >= 1.0.0, < 2.0.0
 numpy >= 1.16
 opencensus
-prometheus_client >= 0.7.1
+prometheus_client >= 0.7.1, < 0.14.0
 protobuf >= 3.8.0
 py-spy >= 0.2.0
 pydantic >= 1.8
diff --git a/python/requirements/requirements_default.txt b/python/requirements/requirements_default.txt
index 3033be94f..ecb2b7141 100644
--- a/python/requirements/requirements_default.txt
+++ b/python/requirements/requirements_default.txt
@@ -1,7 +1,7 @@
-aiohttp>=3.7
+aiohttp >= 3.7
 aiosignal
 aiohttp_cors
 colorful
 opencensus
-prometheus_client>=0.7.1
+prometheus_client >= 0.7.1, < 0.14.0
 smart_open
\ No newline at end of file
diff --git a/python/setup.py b/python/setup.py
index e10b216ca..0598c6f9f 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -213,7 +213,7 @@ if setup_spec.type == SetupType.RAY:
             "requests",
             "gpustat >= 1.0.0b1",  # for windows
             "opencensus",
-            "prometheus_client >= 0.7.1",
+            "prometheus_client >= 0.7.1, < 0.14.0",
             "smart_open",
         ],
         "serve": ["uvicorn==0.16.0", "requests", "starlette", "fastapi", "aiorwlock"],