diff --git a/Gemfile b/Gemfile
index ccb20014592..28257d59186 100644
--- a/Gemfile
+++ b/Gemfile
@@ -204,7 +204,7 @@ gem 'rack-mini-profiler',  '0.9.0.pre ', require: false
 gem 'rack-cors', require: false
 gem 'unicorn', require: false
 gem 'puma', require: false
-gem 'rbtrace', require: false
+gem 'rbtrace', require: false, platform: :mri
 
 # required for feed importing and embedding
 gem 'ruby-readability', require: false