diff --git a/Gemfile b/Gemfile
index cb062ac..1ed2890 100644
--- a/Gemfile
+++ b/Gemfile
@@ -59,7 +59,7 @@ gem 'puma'
 gem 'kramdown'
 gem 'nprogress-rails'
 gem "strip_attributes"
-gem 'nokogiri', '1.6.8'
+gem 'nokogiri', '1.12.5'
 
 group :development do
   # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
diff --git a/Gemfile.lock b/Gemfile.lock
index e5c0849..26cf2f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,16 +111,16 @@ GEM
       mini_mime (>= 0.1.1)
     method_source (0.9.0)
     mini_mime (1.0.0)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.6.1)
     minitest (5.11.3)
     multi_json (1.12.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
     nested_form (0.3.2)
     nio4r (2.3.0)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     nprogress-rails (0.2.0.2)
     oauth2 (1.2.0)
       faraday (>= 0.8, < 0.10)
@@ -141,11 +141,11 @@ GEM
       omniauth (~> 1.2)
     orm_adapter (0.5.0)
     pg (0.19.0)
-    pkg-config (1.1.9)
     pr_geohash (1.0.0)
     puma (3.11.3)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
+    racc (1.5.2)
     rack (2.0.4)
     rack-pjax (1.0.0)
       nokogiri (~> 1.5)
@@ -292,7 +292,7 @@ DEPENDENCIES
   kaminari
   kramdown
   listen (~> 3.0.5)
-  nokogiri (= 1.6.8)
+  nokogiri (= 1.12.5)
   nprogress-rails
   omniauth-google-oauth2
   pg