diff --git a/homeassistant/components/prometheus/manifest.json b/homeassistant/components/prometheus/manifest.json
index cb8defb2ed5..8c43be8539d 100644
--- a/homeassistant/components/prometheus/manifest.json
+++ b/homeassistant/components/prometheus/manifest.json
@@ -6,5 +6,5 @@
   "documentation": "https://www.home-assistant.io/integrations/prometheus",
   "iot_class": "assumed_state",
   "loggers": ["prometheus_client"],
-  "requirements": ["prometheus-client==0.17.1"]
+  "requirements": ["prometheus-client==0.21.0"]
 }
diff --git a/requirements_all.txt b/requirements_all.txt
index 76fa06a3972..4130f765bd9 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1630,7 +1630,7 @@ prayer-times-calculator-offline==1.0.3
 proliphix==0.4.1
 
 # homeassistant.components.prometheus
-prometheus-client==0.17.1
+prometheus-client==0.21.0
 
 # homeassistant.components.proxmoxve
 proxmoxer==2.0.1
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 2d3bb326df0..367d98fdc71 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1331,7 +1331,7 @@ praw==7.5.0
 prayer-times-calculator-offline==1.0.3
 
 # homeassistant.components.prometheus
-prometheus-client==0.17.1
+prometheus-client==0.21.0
 
 # homeassistant.components.hardware
 # homeassistant.components.recorder