diff --git a/Gemfile.lock b/Gemfile.lock
index b3adce7..7f53b9c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -111,11 +111,10 @@ GEM
     middleman-syntax (3.0.0)
       middleman-core (>= 3.2)
       rouge (~> 2.0)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.4.0)
     minitest (5.9.0)
-    nokogiri (1.6.8)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
+    nokogiri (1.10.8)
+      mini_portile2 (~> 2.4.0)
     padrino-helpers (0.13.2)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.13.2)
@@ -123,7 +122,6 @@ GEM
     padrino-support (0.13.2)
       activesupport (>= 3.1)
     parallel (1.9.0)
-    pkg-config (1.1.7)
     rack (1.6.4)
     rack-livereload (0.3.16)
       rack