diff --git a/Calculator/Gemfile b/Calculator/Gemfile
index 99f6cc4..1075046 100644
--- a/Calculator/Gemfile
+++ b/Calculator/Gemfile
@@ -30,7 +30,7 @@ gem 'jbuilder', '~> 2.5'
 # Use ActiveModel has_secure_password
 # gem 'bcrypt', '~> 3.1.7'
 # Nokogiri is an open source software library to parse HTML and XML in Ruby. Explicitly updated to counter security vulnerability.
-gem 'nokogiri', '~> 1.10.4'
+gem 'nokogiri', '~> 1.11.4'
 
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
diff --git a/Calculator/Gemfile.lock b/Calculator/Gemfile.lock
index 7ddef05..2fff768 100644
--- a/Calculator/Gemfile.lock
+++ b/Calculator/Gemfile.lock
@@ -87,14 +87,16 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
     mini_mime (0.1.4)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.1)
     minitest (5.10.3)
     multi_json (1.12.2)
     nio4r (2.1.0)
-    nokogiri (1.10.4)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     public_suffix (3.0.0)
     puma (3.12.2)
+    racc (1.5.2)
     rack (2.0.8)
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
@@ -188,7 +190,7 @@ DEPENDENCIES
   coffee-rails (~> 4.2)
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
-  nokogiri (~> 1.10.4)
+  nokogiri (~> 1.11.4)
   puma (~> 3.12)
   rails (~> 5.1.4)
   sass-rails (~> 5.0)