diff --git a/Gemfile b/Gemfile
index 04e2a5c35..d2429088a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -77,7 +77,7 @@ group :development, :test do
   gem "i18n-tasks", "~> 0.9.34"
   gem "knapsack_pro", "~> 3.3.1"
   gem "launchy", "~> 2.5.0"
-  gem "letter_opener_web", "~> 1.4.0"
+  gem "letter_opener_web", "~> 2.0.0"
   gem "spring", "~> 2.1.1"
   gem "spring-commands-rspec", "~> 1.0.4"
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index e100d42e6..a52e4f0c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -362,12 +362,13 @@ GEM
       kramdown (~> 2.0)
     launchy (2.5.0)
       addressable (~> 2.7)
-    letter_opener (1.7.0)
-      launchy (~> 2.2)
-    letter_opener_web (1.4.0)
-      actionmailer (>= 3.2)
-      letter_opener (~> 1.0)
-      railties (>= 3.2)
+    letter_opener (1.8.1)
+      launchy (>= 2.2, < 3)
+    letter_opener_web (2.0.0)
+      actionmailer (>= 5.2)
+      letter_opener (~> 1.7)
+      railties (>= 5.2)
+      rexml
     loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -753,7 +754,7 @@ DEPENDENCIES
   kaminari (~> 1.2.2)
   knapsack_pro (~> 3.3.1)
   launchy (~> 2.5.0)
-  letter_opener_web (~> 1.4.0)
+  letter_opener_web (~> 2.0.0)
   mdl (~> 0.11.0)
   mini_magick (~> 4.11.0)
   omniauth (~> 2.0.4)