diff --git a/Gemfile.lock b/Gemfile.lock
index f1e8f02..114f8bb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,10 +1,10 @@
 PATH
   remote: .
   specs:
-    cassandra-web (0.4.0)
+    cassandra-web (0.5.0)
       cassandra-driver (~> 3.1)
       lz4-ruby (~> 0.3)
-      rack-cors (~> 0.2)
+      rack-cors (>= 0.2, < 2.0)
       rack-parser (~> 0.6)
       sinatra (~> 1.4)
       thin (~> 1.6)
@@ -12,14 +12,15 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    cassandra-driver (3.2.3)
+    cassandra-driver (3.2.0)
       ione (~> 1.2)
     daemons (1.3.1)
     eventmachine (1.2.7)
     ione (1.2.4)
     lz4-ruby (0.3.3)
-    rack (1.6.11)
-    rack-cors (0.4.1)
+    rack (1.6.13)
+    rack-cors (1.0.6)
+      rack (>= 1.6.0)
     rack-parser (0.7.0)
       rack
     rack-protection (1.5.5)
@@ -29,11 +30,11 @@ GEM
       rack (~> 1.5)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
-    thin (1.7.2)
+    thin (1.8.0)
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.9)
+    tilt (2.0.10)
 
 PLATFORMS
   ruby
diff --git a/cassandra-web.gemspec b/cassandra-web.gemspec
index 5a30e11..d2787eb 100644
--- a/cassandra-web.gemspec
+++ b/cassandra-web.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency 'cassandra-driver', '~> 3.1'
   s.add_runtime_dependency 'thin',             '~> 1.6'
-  s.add_runtime_dependency 'rack-cors',        '~> 0.2'
+  s.add_runtime_dependency 'rack-cors',        '>= 0.2', '< 2.0'
   s.add_runtime_dependency 'rack-parser',      '~> 0.6'
   s.add_runtime_dependency 'sinatra',          '~> 1.4'
   s.add_runtime_dependency 'lz4-ruby',         '~> 0.3'