diff --git a/Gemfile.lock b/Gemfile.lock
index 1b854b57..03265af7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,7 +85,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.5)
     connection_pool (2.2.2)
-    crass (1.0.5)
+    crass (1.0.6)
     date_validator (0.9.0)
       activemodel
       activesupport
@@ -136,7 +136,7 @@ GEM
     letsencrypt-rails-heroku (1.2.0)
       acme-client (~> 0.4.0)
       platform-api
-    loofah (2.3.1)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -147,7 +147,9 @@ GEM
       thread_safe (~> 0.3, >= 0.3.1)
     metaclass (0.0.4)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)