diff --git a/Gemfile b/Gemfile
index 17e75538c57..9289d3f856d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -100,7 +100,8 @@ gem 'sanitize'
 gem 'sidekiq'
 
 # for sidekiq web
-gem 'sinatra', require: false
+gem 'tilt', require: false
+
 gem 'execjs', require: false
 gem 'mini_racer'
 gem 'highline', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index bae80137d57..bc80823f5e9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -341,10 +341,6 @@ GEM
       rack-protection (>= 1.5.0)
       redis (~> 3.3, >= 3.3.3)
     simple-rss (1.3.1)
-    sinatra (1.4.8)
-      rack (~> 1.5)
-      rack-protection (~> 1.4)
-      tilt (>= 1.3, < 3)
     slop (3.6.0)
     spork (1.0.0rc4)
     spork-rails (4.0.0)
@@ -471,11 +467,11 @@ DEPENDENCIES
   shoulda
   sidekiq
   simple-rss
-  sinatra
   spork-rails
   stackprof
   test_after_commit
   thor
+  tilt
   timecop
   uglifier
   unf