diff --git a/Gemfile b/Gemfile
index e3c78d49..8cbb8467 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,5 @@ source "https://rubygems.org"
 
 # Specify your gem's dependencies in govuk_tech_docs.gemspec
 gemspec
+
+gem "terser"
\ No newline at end of file
diff --git a/example/Gemfile b/example/Gemfile
index 0d4908e1..d4b4869f 100644
--- a/example/Gemfile
+++ b/example/Gemfile
@@ -1,3 +1,5 @@
 source "https://rubygems.org"
 
 gem "govuk_tech_docs", path: ".."
+
+gem "terser"
diff --git a/lib/govuk_tech_docs.rb b/lib/govuk_tech_docs.rb
index cf5733ac..8f066cae 100644
--- a/lib/govuk_tech_docs.rb
+++ b/lib/govuk_tech_docs.rb
@@ -57,6 +57,7 @@ def self.configure(context, options = {})
 
     context.configure :build do
       activate :autoprefixer
+      activate :minify_javascript, compressor: Terser.new
       # activate :minify_javascript, ignore: ["/raw_assets/*"]
     end