diff --git a/requirements_prometheus.txt b/requirements_prometheus.txt
index dab9d89..fb5de89 100644
--- a/requirements_prometheus.txt
+++ b/requirements_prometheus.txt
@@ -1,4 +1,4 @@
 -r requirements.txt
 prometheus-async==17.3.0
-prometheus-client==0.0.19
+prometheus-client==0.21.1
 wrapt==1.16.0