diff --git a/Gemfile.lock b/Gemfile.lock
index 20e8662..4d811d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -83,8 +83,6 @@ GEM
     concurrent-ruby (1.1.6)
     connection_pool (2.2.3)
     crass (1.0.6)
-    css_parser (1.7.1)
-      addressable
     database_cleaner (1.8.5)
     database_cleaner-active_record (1.8.0)
       activerecord
@@ -116,7 +114,6 @@ GEM
     flutie (2.2.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    htmlentities (4.3.4)
     i18n (1.8.3)
       concurrent-ruby (~> 1.0)
     jbuilder (2.10.0)
@@ -143,7 +140,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.5.0)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -181,13 +178,6 @@ GEM
     postmark-rails (0.20.0)
       actionmailer (>= 3.0.0)
       postmark (~> 1.15)
-    premailer (1.11.1)
-      addressable
-      css_parser (>= 1.6.0)
-      htmlentities (>= 4.0.0)
-    premailer-rails (1.11.1)
-      actionmailer (>= 3)
-      premailer (~> 1.7, >= 1.7.9)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
@@ -221,7 +211,7 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
+    rails-html-sanitizer (1.4.3)
       loofah (~> 2.3)
     railties (5.2.4.3)
       actionpack (= 5.2.4.3)
@@ -378,7 +368,6 @@ DEPENDENCIES
   pg
   pg_search (~> 2.3.0)
   postmark-rails
-  premailer-rails
   pry (~> 0.12.2)
   puma (~> 3.12)
   rails (~> 5.2.4)