diff --git a/app/helpers/upmin/application_helper.rb b/app/helpers/upmin/application_helper.rb
index b304c65..99bdaee 100644
--- a/app/helpers/upmin/application_helper.rb
+++ b/app/helpers/upmin/application_helper.rb
@@ -3,10 +3,10 @@ module ApplicationHelper
     def body_classes
       ret = []
 
-      controller = "c-#{params[:controller].gsub(/_/, "-").gsub("upmin/", "")}"
+      controller = "c-#{params[:controller].tr("_", "-").tr("upmin/", "")}"
       ret << controller
 
-      action = "a-#{params[:action].gsub(/_/, "-")}"
+      action = "a-#{params[:action].tr("_", "-")}"
       ret << action
 
       if params[:klass]
@@ -19,7 +19,7 @@ def body_classes
 
     def body_data
       ret = {}
-      ret[:controller] = params[:controller].camelize.gsub("Upmin::", "")
+      ret[:controller] = params[:controller].camelize.tr("Upmin::", "")
       ret[:action] = params[:action].camelize
       return ret
     end
diff --git a/app/views/upmin/partials/search_boxes/_ransack_search_box.html.haml b/app/views/upmin/partials/search_boxes/_ransack_search_box.html.haml
index a0886a3..28cb42c 100644
--- a/app/views/upmin/partials/search_boxes/_ransack_search_box.html.haml
+++ b/app/views/upmin/partials/search_boxes/_ransack_search_box.html.haml
@@ -10,12 +10,12 @@
     -# TODO(jon): Break these into partials possibly?
     - if type == :string
       .form-group
-        = label(:q, "#{attr_name}_cont", attr_name.to_s.capitalize.gsub("_", " "))
+        = label(:q, "#{attr_name}_cont", attr_name.to_s.capitalize.tr("_", " "))
         = text_field(:q, "#{attr_name}_cont", class: "form-control")
 
     - if type == :integer
       .form-group
-        = label(:q, "#{attr_name}_cont", attr_name.to_s.capitalize.gsub("_", " "))
+        = label(:q, "#{attr_name}_cont", attr_name.to_s.capitalize.tr("_", " "))
         .input-group
           .input-group-addon From
           = number_field(:q, "#{attr_name}_gteq", class: "form-control")
@@ -25,7 +25,7 @@
     - if type == :datetime && Rails::VERSION::MAJOR == 4
       -# TODO(jon): Add date fields to search boxes for Rails 3
       .form-group
-        = label(:q, "#{attr_name}_cont", attr_name.to_s.capitalize.gsub("_", " "))
+        = label(:q, "#{attr_name}_cont", attr_name.to_s.capitalize.tr("_", " "))
         %br
         From
         = date_field(:q, "#{attr_name}_gteq", class: "form-control")
diff --git a/lib/upmin/attribute.rb b/lib/upmin/attribute.rb
index 5d68001..2e54878 100644
--- a/lib/upmin/attribute.rb
+++ b/lib/upmin/attribute.rb
@@ -51,7 +51,7 @@ def errors?
     end
 
     def label_name
-      return name.to_s.gsub(/_/, " ").capitalize
+      return name.to_s.tr("_", " ").capitalize
     end
 
     def form_id
diff --git a/lib/upmin/model.rb b/lib/upmin/model.rb
index d38ba33..3415388 100644
--- a/lib/upmin/model.rb
+++ b/lib/upmin/model.rb
@@ -111,7 +111,7 @@ def Model.find_class(model)
     def Model.find_or_create_class(model_name)
       ::Rails.application.eager_load!
 
-      create_name = model_name.gsub(":", "")
+      create_name = model_name.tr(":", "")
       return "Admin#{create_name}".constantize
     rescue NameError
       if model_name.match(/::/)
@@ -170,7 +170,7 @@ def Model.model_name
     end
 
     def Model.humanized_name(type = :plural)
-      names = model_class_name.split(/(?=[A-Z])/).map{|n| n.gsub(":", "")}
+      names = model_class_name.split(/(?=[A-Z])/).map{|n| n.tr(":", "")}
       if type == :plural
         names[names.length-1] = names.last.pluralize
       end
diff --git a/lib/upmin/parameter.rb b/lib/upmin/parameter.rb
index c5d4dc9..535980d 100644
--- a/lib/upmin/parameter.rb
+++ b/lib/upmin/parameter.rb
@@ -18,7 +18,7 @@ def title
     end
 
     def label_name
-      name.to_s.capitalize.gsub("_", " ")
+      name.to_s.capitalize.tr("_", " ")
     end
 
     def type