diff --git a/Gemfile.lock b/Gemfile.lock
index 315e179..a70dc24 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,7 +30,7 @@ PATH
       jquery-ui-rails (~> 5.0.5)
       kaminari
       mimemagic (>= 0.3.10)
-      nokogiri (>= 1.10, < 1.13)
+      nokogiri (>= 1.10, < 1.14)
       openbabel
       paperclip (~> 5.2.0)
       rails (~> 5.2.0)
@@ -199,7 +199,7 @@ GEM
       nokogiri (~> 1)
       rake
     mini_mime (1.1.2)
-    mini_portile2 (2.6.1)
+    mini_portile2 (2.8.0)
     minitest (5.14.4)
     multi_xml (0.6.0)
     mustermann (1.1.1)
@@ -207,8 +207,8 @@ GEM
     mustermann-grape (1.0.1)
       mustermann (>= 1.0.0)
     nio4r (2.5.8)
-    nokogiri (1.12.5)
-      mini_portile2 (~> 2.6.1)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     paperclip (5.2.1)
       activemodel (>= 4.2.0)
diff --git a/ketcherails.gemspec b/ketcherails.gemspec
index 2272b1c..b21bd37 100644
--- a/ketcherails.gemspec
+++ b/ketcherails.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "rails", "~> 5.2.0"
   s.add_dependency "jquery-rails"
-  s.add_dependency "nokogiri", ">= 1.10", "< 1.13"
+  s.add_dependency "nokogiri", ">= 1.10", "< 1.14"
   s.add_dependency "haml-rails"
   s.add_dependency "jquery-ui-rails", "~> 5.0.5"
   s.add_dependency 'kaminari'