diff --git a/.rubocop.yml b/.rubocop.yml
index 5336c0b7..def4c57c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -8,6 +8,8 @@ AllCops:
     - test/fixtures/**/*
     # Get the code passing first then we will enable for tests
     - test/**/*
+Performance:
+  enabled: true    
 Documentation:
   Enabled: false
 Metrics/MethodLength:
diff --git a/lib/coverband/adapters/hash_redis_store.rb b/lib/coverband/adapters/hash_redis_store.rb
index 12ee4780..1b5366ce 100644
--- a/lib/coverband/adapters/hash_redis_store.rb
+++ b/lib/coverband/adapters/hash_redis_store.rb
@@ -139,7 +139,7 @@ def script_input(key:, file:, file_hash:, data:, report_time:, updated_time:)
           file_length: data.length,
           hash_key: key
         }
-        meta.merge!(last_updated_at: updated_time) if updated_time
+        meta[:last_updated_at] = updated_time if updated_time
         {
           hash_key: key,
           meta: meta,