diff --git a/Gemfile.lock b/Gemfile.lock
index 0f351bb..ea38d59 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,7 +52,7 @@ GEM
     concurrent-ruby (1.1.5)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
-    crass (1.0.4)
+    crass (1.0.6)
     debug_inspector (0.0.3)
     erubis (2.7.0)
     execjs (2.7.0)
@@ -69,17 +69,19 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.6)
-    loofah (2.2.3)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     minitest (5.11.3)
-    nokogiri (1.10.4)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.10)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     public_suffix (4.0.1)
+    racc (1.6.1)
     rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -100,8 +102,8 @@ GEM
       activesupport (>= 4.2.0, < 5.0)
       nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.2.0)
-      loofah (~> 2.2, >= 2.2.2)
+    rails-html-sanitizer (1.4.4)
+      loofah (~> 2.19, >= 2.19.1)
     railties (4.2.11.1)
       actionpack (= 4.2.11.1)
       activesupport (= 4.2.11.1)
@@ -127,7 +129,6 @@ GEM
     sdoc (0.4.2)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
-    spring (2.1.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -167,7 +168,6 @@ DEPENDENCIES
   rails (= 4.2.11.1)
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
-  spring
   sqlite3
   turbolinks
   uglifier (>= 1.3.0)