diff --git a/Gemfile.lock b/Gemfile.lock
index a57868a..81bff12 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GIT
 PATH
   remote: .
   specs:
-    ketcherails (0.1.9)
+    ketcherails (0.1.12)
       active_model_serializers (< 0.10.0)
       bootstrap-kaminari-views (= 0.0.5)
       bootstrap-sass
@@ -24,31 +24,31 @@ PATH
       nokogiri (~> 1.10.0)
       openbabel
       paperclip (~> 5.2.0)
-      rails (~> 5.1.0)
+      rails (~> 5.2.0)
       sprite-factory (= 1.7.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.1.7)
-      actionpack (= 5.1.7)
+    actioncable (5.2.4.4)
+      actionpack (= 5.2.4.4)
       nio4r (~> 2.0)
-      websocket-driver (~> 0.6.1)
-    actionmailer (5.1.7)
-      actionpack (= 5.1.7)
-      actionview (= 5.1.7)
-      activejob (= 5.1.7)
+      websocket-driver (>= 0.6.1)
+    actionmailer (5.2.4.4)
+      actionpack (= 5.2.4.4)
+      actionview (= 5.2.4.4)
+      activejob (= 5.2.4.4)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.1.7)
-      actionview (= 5.1.7)
-      activesupport (= 5.1.7)
-      rack (~> 2.0)
+    actionpack (5.2.4.4)
+      actionview (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
+      rack (~> 2.0, >= 2.0.8)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.1.7)
-      activesupport (= 5.1.7)
+    actionview (5.2.4.4)
+      activesupport (= 5.2.4.4)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
@@ -56,21 +56,25 @@ GEM
     active_model_serializers (0.9.7)
       activemodel (>= 3.2)
       concurrent-ruby (~> 1.0)
-    activejob (5.1.7)
-      activesupport (= 5.1.7)
+    activejob (5.2.4.4)
+      activesupport (= 5.2.4.4)
       globalid (>= 0.3.6)
-    activemodel (5.1.7)
-      activesupport (= 5.1.7)
-    activerecord (5.1.7)
-      activemodel (= 5.1.7)
-      activesupport (= 5.1.7)
-      arel (~> 8.0)
-    activesupport (5.1.7)
+    activemodel (5.2.4.4)
+      activesupport (= 5.2.4.4)
+    activerecord (5.2.4.4)
+      activemodel (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
+      arel (>= 9.0)
+    activestorage (5.2.4.4)
+      actionpack (= 5.2.4.4)
+      activerecord (= 5.2.4.4)
+      marcel (~> 0.3.1)
+    activesupport (5.2.4.4)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    arel (8.0.0)
+    arel (9.0.0)
     autoprefixer-rails (10.0.2.0)
       execjs
     bootstrap-generators (3.3.4)
@@ -135,7 +139,7 @@ GEM
       grape
     grape-swagger (1.3.1)
       grape (~> 1.3)
-    haml (5.2.0)
+    haml (5.2.1)
       temple (>= 0.8.0)
       tilt
     haml-rails (2.0.1)
@@ -177,6 +181,8 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
+    marcel (0.3.3)
+      mimemagic (~> 0.3.2)
     method_source (1.0.0)
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
@@ -205,29 +211,30 @@ GEM
       rack (>= 0.4)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.1.7)
-      actioncable (= 5.1.7)
-      actionmailer (= 5.1.7)
-      actionpack (= 5.1.7)
-      actionview (= 5.1.7)
-      activejob (= 5.1.7)
-      activemodel (= 5.1.7)
-      activerecord (= 5.1.7)
-      activesupport (= 5.1.7)
+    rails (5.2.4.4)
+      actioncable (= 5.2.4.4)
+      actionmailer (= 5.2.4.4)
+      actionpack (= 5.2.4.4)
+      actionview (= 5.2.4.4)
+      activejob (= 5.2.4.4)
+      activemodel (= 5.2.4.4)
+      activerecord (= 5.2.4.4)
+      activestorage (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
       bundler (>= 1.3.0)
-      railties (= 5.1.7)
+      railties (= 5.2.4.4)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.3.0)
       loofah (~> 2.3)
-    railties (5.1.7)
-      actionpack (= 5.1.7)
-      activesupport (= 5.1.7)
+    railties (5.2.4.4)
+      actionpack (= 5.2.4.4)
+      activesupport (= 5.2.4.4)
       method_source
       rake (>= 0.8.7)
-      thor (>= 0.18.1, < 2.0)
+      thor (>= 0.19.0, < 2.0)
     rake (13.0.1)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
@@ -263,7 +270,7 @@ GEM
     tilt (2.0.10)
     tzinfo (1.2.8)
       thread_safe (~> 0.1)
-    websocket-driver (0.6.5)
+    websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
 
diff --git a/ketcherails.gemspec b/ketcherails.gemspec
index 88622b3..33c8121 100644
--- a/ketcherails.gemspec
+++ b/ketcherails.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*", "LICENSE.txt", "Rakefile", "README.md"]
   s.test_files = Dir["spec/**/*"]
 
-  s.add_dependency "rails", "~> 5.1.0"
+  s.add_dependency "rails", "~> 5.2.0"
   s.add_dependency "jquery-rails"
   s.add_dependency "nokogiri", "~> 1.10.0"
   s.add_dependency "haml-rails"
diff --git a/lib/ketcherails/version.rb b/lib/ketcherails/version.rb
index 1440905..d89012a 100644
--- a/lib/ketcherails/version.rb
+++ b/lib/ketcherails/version.rb
@@ -1,3 +1,3 @@
 module Ketcherails
-  VERSION = "0.1.11"
+  VERSION = "0.1.12"
 end