diff --git a/Gemfile b/Gemfile
index c08d372a5..0f15ad8c2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,5 @@
 source "https://rubygems.org"
 
-ruby File.read(".ruby-version").strip
-
 gem "rails", "6.0.3.3"
 
 gem "dalli"
diff --git a/Gemfile.lock b/Gemfile.lock
index 1a6ed3100..9dd8fb63e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -71,7 +71,7 @@ GEM
       rack (>= 0.9.0)
     binding_of_caller (0.8.0)
       debug_inspector (>= 0.0.1)
-    brakeman (4.8.2)
+    brakeman (4.9.1)
     builder (3.2.4)
     capybara (3.33.0)
       addressable
@@ -137,7 +137,7 @@ GEM
       domain_name (~> 0.5)
     i18n (1.8.5)
       concurrent-ruby (~> 1.0)
-    image_size (2.0.2)
+    image_size (2.1.0)
     io-like (0.3.1)
     jasmine (3.6.0)
       jasmine-core (~> 3.6.0)
@@ -197,8 +197,8 @@ GEM
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (4.0.5)
-    puma (4.3.5)
+    public_suffix (4.0.6)
+    puma (4.3.6)
       nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -266,8 +266,8 @@ GEM
       rubocop-ast (>= 0.1.0, < 1.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.2.0)
-      parser (>= 2.7.0.1)
+    rubocop-ast (0.3.0)
+      parser (>= 2.7.1.4)
     rubocop-govuk (3.17.0)
       rubocop (= 0.87.1)
       rubocop-rails (= 2.6.0)
@@ -400,8 +400,5 @@ DEPENDENCIES
   webmock
   wraith
 
-RUBY VERSION
-   ruby 2.6.6
-
 BUNDLED WITH
    1.17.3
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index e9b831c96..41e929d77 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -18,6 +18,6 @@ def content_item_path
                                  .compact
                                  .join(".")
 
-    "/" + URI.encode(path_and_optional_locale) # rubocop:disable Lint/UriEscapeUnescape
+    "/" + URI.encode_www_form_component(path_and_optional_locale).gsub("%2F", "/")
   end
 end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index e7ca95305..274bdd347 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -4,9 +4,9 @@ def page_text_direction
   end
 
   def t_locale_fallback(key, options = {})
-    options["locale"] = I18n.locale
+    options[:locale] = I18n.locale
     options[:fallback] = nil
-    translation = I18n.t(key, options)
+    translation = I18n.t(key, **options)
 
     if translation.nil? || translation.include?("translation missing")
       I18n.default_locale