diff --git a/setup.py b/setup.py
index 6ea5ac0612..a3cab3ff9f 100644
--- a/setup.py
+++ b/setup.py
@@ -100,7 +100,7 @@ def get_static_files(path):
     },
     install_requires=install_requires,
     extras_require={
-        'prometheus': ['prometheus-client==0.5.0'],
+        'prometheus': ['prometheus-client>=0.5,<0.15'],
         'toml': ['toml<2.0.0'],
     },
     classifiers=[
diff --git a/tox.ini b/tox.ini
index bef244640b..bf67bb3513 100644
--- a/tox.ini
+++ b/tox.ini
@@ -57,7 +57,7 @@ deps =
     responses<1.0.0
     azure-storage<=0.36
     datadog==0.22.0
-    prometheus-client==0.5.0
+    prometheus-client>=0.5.0<0.15
     dropbox: dropbox>=9.3.0<10.0
 passenv =
     USER JAVA_HOME POSTGRES_USER DATAPROC_TEST_PROJECT_ID GCS_TEST_PROJECT_ID GCS_TEST_BUCKET GOOGLE_APPLICATION_CREDENTIALS TRAVIS_BUILD_ID TRAVIS TRAVIS_BRANCH TRAVIS_JOB_NUMBER TRAVIS_PULL_REQUEST TRAVIS_JOB_ID TRAVIS_REPO_SLUG TRAVIS_COMMIT CI DROPBOX_APP_TOKEN DOCKERHUB_TOKEN GITHUB_ACTIONS OVERRIDE_SKIP_CI_TESTS