diff --git a/lib/gitlab/json_cache.rb b/lib/gitlab/json_cache.rb
index e4bc437d787..9a0b2b35112 100644
--- a/lib/gitlab/json_cache.rb
+++ b/lib/gitlab/json_cache.rb
@@ -58,7 +58,7 @@ module Gitlab
     private
 
     def parse_value(raw, klass)
-      value = ActiveSupport::JSON.decode(raw)
+      value = ActiveSupport::JSON.decode(raw.to_s)
 
       case value
       when Hash then parse_entry(value, klass)
diff --git a/spec/lib/gitlab/json_cache_spec.rb b/spec/lib/gitlab/json_cache_spec.rb
index b82c09af306..c6a6042c65c 100644
--- a/spec/lib/gitlab/json_cache_spec.rb
+++ b/spec/lib/gitlab/json_cache_spec.rb
@@ -106,6 +106,16 @@ describe Gitlab::JsonCache do
       expect(cache.read(key)).to be_nil
     end
 
+    context 'when the cached value is a boolean' do
+      it 'parses the cached value' do
+        allow(backend).to receive(:read)
+          .with(expanded_key)
+          .and_return(true)
+
+        expect(cache.read(key, BroadcastMessage)).to eq(true)
+      end
+    end
+
     context 'when the cached value is a hash' do
       it 'parses the cached value' do
         allow(backend).to receive(:read)