diff --git a/Gemfile.lock b/Gemfile.lock
index 3ab0fb3..cc2eb4a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -73,7 +73,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.4)
-    crass (1.0.4)
+    crass (1.0.6)
     devise (4.5.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -125,7 +125,7 @@ GEM
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    loofah (2.2.3)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -137,7 +137,7 @@ GEM
     multi_json (1.13.1)
     mustermann (1.0.3)
     nio4r (2.3.1)
-    nokogiri (1.9.1)
+    nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     orm_adapter (0.5.0)
     pg (0.21.0)
@@ -167,8 +167,8 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.4)
-      loofah (~> 2.2, >= 2.2.2)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging