diff --git a/Gemfile b/Gemfile
index 05bc5de5e..1d801c72b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,6 @@ gem "ahoy_matey", "~> 1.6.0"
 gem "ancestry", "~> 3.0.7"
 gem "audited", "~> 4.9.0"
 gem "autoprefixer-rails", "~> 8.2.0"
-gem "browser", "~> 2.5.3"
 gem "cancancan", "~> 2.3.0"
 gem "ckeditor", "~> 4.3.0"
 gem "cocoon", "~> 1.2.9"
diff --git a/Gemfile.lock b/Gemfile.lock
index 596d9764e..68177c2ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -586,7 +586,6 @@ DEPENDENCIES
   ancestry (~> 3.0.7)
   audited (~> 4.9.0)
   autoprefixer-rails (~> 8.2.0)
-  browser (~> 2.5.3)
   bullet (~> 5.7.0)
   byebug (~> 10.0.0)
   cancancan (~> 2.3.0)
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 6fa18d05e..33f16faa3 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -21,7 +21,7 @@
     <div class="wrapper <%= yield (:wrapper_class) %>">
       <%= render "layouts/header", with_subnavigation: true %>
 
-      <% if browser.ie? && cookies["ie_alert_closed"] != "true" %>
+      <% if request.headers["User-Agent"] =~ /MSIE/ && cookies["ie_alert_closed"] != "true" %>
       <!--[if lt IE 9]>
         <div data-alert class="callout primary ie-callout" data-closable>
           <button class="close-button ie-callout-close-js"