diff --git a/Gemfile b/Gemfile
index e5023a6f67d2ec422167375b02be21fef5a7837e..570462822f223626246012eacefb107d502c3db1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -438,6 +438,7 @@ gem 'toml-rb', '~> 1.0.0', require: false
 gem 'flipper', '~> 0.13.0'
 gem 'flipper-active_record', '~> 0.13.0'
 gem 'flipper-active_support_cache_store', '~> 0.13.0'
+gem 'unleash', '~> 0.1.5'
 
 # Structured logging
 gem 'lograge', '~> 0.5'
diff --git a/Gemfile.lock b/Gemfile.lock
index d9a32027f3c3b9f72b2db5c3281327f6367c89f2..43b9eec49677ef1f4a698d75553e2eb5c1d63c18 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -535,6 +535,7 @@ GEM
     multi_json (1.13.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
+    murmurhash3 (0.1.6)
     mustermann (1.0.3)
     mustermann-grape (1.0.0)
       mustermann (~> 1.0.0)
@@ -972,6 +973,8 @@ GEM
       get_process_mem (~> 0)
       unicorn (>= 4, < 6)
     uniform_notifier (1.10.0)
+    unleash (0.1.5)
+      murmurhash3 (~> 0.1.6)
     unparser (0.4.5)
       abstract_type (~> 0.0.7)
       adamantium (~> 0.2.0)
@@ -1251,6 +1254,7 @@ DEPENDENCIES
   unf (~> 0.1.4)
   unicorn (~> 5.4.1)
   unicorn-worker-killer (~> 0.4.4)
+  unleash (~> 0.1.5)
   validates_hostname (~> 1.0.6)
   version_sorter (~> 2.2.4)
   vmstat (~> 2.3.0)