diff --git a/Gemfile b/Gemfile
index db4accfb..8526a483 100644
--- a/Gemfile
+++ b/Gemfile
@@ -51,7 +51,7 @@ gem 'clockwork'
 
 # Monitoring
 gem 'gds_metrics', '~> 0.1.0'
-gem 'prometheus_exporter', '~> 0.4.5'
+gem 'prometheus_exporter', '~> 0.5.1'
 
 # HTTP
 gem 'httparty', '~> 0.17.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index cfaab98a..6bc381f9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -252,7 +252,7 @@ GEM
     pg (1.2.3)
     powerpack (0.1.2)
     prometheus-client-mmap (0.9.1)
-    prometheus_exporter (0.4.17)
+    prometheus_exporter (0.5.1)
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
@@ -451,7 +451,7 @@ DEPENDENCIES
   lograge (~> 0.11.2)
   logstash-event (~> 1.2, >= 1.2.02)
   pg (~> 1.1)
-  prometheus_exporter (~> 0.4.5)
+  prometheus_exporter (~> 0.5.1)
   pry-byebug
   puma (~> 4.3)
   rails (~> 5.2.4.3)