diff --git a/Gemfile b/Gemfile
index 499a0d04..fa982cb3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -31,4 +31,4 @@ group :test do
 end
 
 # odd fixed versions, for Windows
-gem "nokogiri", "~>1.7"
+gem "nokogiri", "~>1.12"
diff --git a/Gemfile.lock b/Gemfile.lock
index a48cfbdd..d0b3962f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,18 +59,20 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.6.1)
     minitest (5.11.3)
     multi_json (1.13.1)
     mustermann (1.0.3)
-    nokogiri (1.8.5)
-      mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.5-x64-mingw32)
-      mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.5-x86-mingw32)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
+      racc (~> 1.4)
+    nokogiri (1.12.5-x64-mingw32)
+      racc (~> 1.4)
+    nokogiri (1.12.5-x86-mingw32)
+      racc (~> 1.4)
     polyglot (0.3.5)
     predicated (0.2.6)
+    racc (1.5.2)
     rack (2.0.6)
     rack-protection (2.0.4)
       rack
@@ -144,7 +146,7 @@ DEPENDENCIES
   files (>= 0.4.0)
   json (~> 1.8)
   listen
-  nokogiri (~> 1.7)
+  nokogiri (~> 1.12)
   rack-rewrite (~> 1.5)
   rake (>= 10.0.1)
   redcarpet