diff --git a/requirements.txt b/requirements.txt
index 83ba1b645..8ba3bba4f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ pydantic~=2.10.4
 requests~=2.32.2
 setuptools~=71.1.0
 cachetools~=5.5.0
-prometheus-client~=0.20.0
+prometheus-client~=0.21.1
 opentelemetry-api~=1.22.0
 opentelemetry-sdk~=1.22.0
 deprecation~=2.1.0
diff --git a/setup.cfg b/setup.cfg
index d0418e291..fe7674c19 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -45,7 +45,7 @@ install_requires =
     requests~=2.32.2
     setuptools~=71.1.0
     cachetools~=5.5.0
-    prometheus-client~=0.20.0
+    prometheus-client~=0.21.1
     opentelemetry-api~=1.22.0
     opentelemetry-sdk~=1.22.0
     deprecation~=2.1.0