diff --git a/pyproject.toml b/pyproject.toml
index 050a3782..9cfe69f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ agents = [
     "fastcore==1.7.4",
     "pydantic==2.8.2",
     "tenacity==9.0.0",
-    "prometheus-client==0.20.0",
+    "prometheus-client==0.21.0",
     "opentelemetry-distro==0.48b0",
     "opentelemetry-instrumentation-fastapi==0.48b0",
     "opentelemetry-instrumentation-logging==0.48b0",