diff --git a/Gemfile.lock b/Gemfile.lock
index cf2fbe6..a5e4c7b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ PATH
     promenade (0.12.0)
       actionpack
       activesupport (> 6.0, < 8.0)
-      prometheus-client-mmap (~> 1.0)
+      prometheus-client-mmap (~> 1.1)
       rack
 
 GEM
diff --git a/promenade.gemspec b/promenade.gemspec
index cf24041..cc04729 100644
--- a/promenade.gemspec
+++ b/promenade.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "actionpack"
   spec.add_dependency "activesupport", "> 6.0", "< 8.0"
-  spec.add_dependency "prometheus-client-mmap", "~> 1.0"
+  spec.add_dependency "prometheus-client-mmap", "~> 1.1"
   spec.add_dependency "rack"
   spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "byebug"