diff --git a/Gemfile b/Gemfile
index 96c1703..b3ae0a0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -43,7 +43,7 @@ gem "haml", "~> 5.0"
 gem "haml-rails", "~> 1.0"
 
 # html parsing:
-gem "nokogiri", "~> 1.10"
+gem "nokogiri", "~> 1.12"
 
 # deleted flags:
 gem "paranoia", "~> 2.4"
diff --git a/Gemfile.lock b/Gemfile.lock
index eaf4077..0dfbe9a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -202,9 +202,11 @@ GEM
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2018.0812)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.6.1)
     minitest (5.13.0)
     multi_json (1.13.1)
     multi_test (0.1.2)
@@ -213,14 +215,16 @@ GEM
       net-ssh (>= 2.6.5)
     net-ssh (5.0.2)
     nio4r (2.5.2)
-    nokogiri (1.10.5)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
     open_uri_redirections (0.2.1)
     orm_adapter (0.5.0)
     paranoia (2.4.1)
       activerecord (>= 4.0, < 5.3)
     public_suffix (3.0.3)
     puma (3.12.0)
+    racc (1.5.2)
     rack (2.0.7)
     rack-cors (1.0.6)
       rack (>= 1.6.0)
@@ -376,7 +380,7 @@ DEPENDENCIES
   jquery-rails (~> 4.3)
   mime-types (~> 3.2)
   mysql2 (~> 0.5.2)
-  nokogiri (~> 1.10)
+  nokogiri (~> 1.12)
   open_uri_redirections (~> 0.2.1)
   paranoia (~> 2.4)
   puma