diff --git a/app/logical/bulk_update_request_processor.rb b/app/logical/bulk_update_request_processor.rb
index 32c80fc27..4c93bfcd0 100644
--- a/app/logical/bulk_update_request_processor.rb
+++ b/app/logical/bulk_update_request_processor.rb
@@ -19,17 +19,17 @@ class BulkUpdateRequestProcessor
 
       case line
       when /\A(?:create alias|aliasing|alias) (\S+) -> (\S+)\z/i
-        [:create_alias, $1, $2]
+        [:create_alias, Tag.normalize_name($1), Tag.normalize_name($2)]
       when /\A(?:create implication|implicating|implicate|imply) (\S+) -> (\S+)\z/i
-        [:create_implication, $1, $2]
+        [:create_implication, Tag.normalize_name($1), Tag.normalize_name($2)]
       when /\A(?:remove alias|unaliasing|unalias) (\S+) -> (\S+)\z/i
-        [:remove_alias, $1, $2]
+        [:remove_alias, Tag.normalize_name($1), Tag.normalize_name($2)]
       when /\A(?:remove implication|unimplicating|unimplicate|unimply) (\S+) -> (\S+)\z/i
-        [:remove_implication, $1, $2]
+        [:remove_implication, Tag.normalize_name($1), Tag.normalize_name($2)]
       when /\A(?:mass update|updating|update|change) (.+?) -> (.*)\z/i
         [:mass_update, $1, $2]
       when /\Acategory (\S+) -> (#{Tag.categories.regexp})\z/i
-        [:change_category, $1, $2]
+        [:change_category, Tag.normalize_name($1), $2.downcase]
       else
         [:invalid_line, line]
       end
diff --git a/app/models/bulk_update_request.rb b/app/models/bulk_update_request.rb
index 531d10be2..996fde440 100644
--- a/app/models/bulk_update_request.rb
+++ b/app/models/bulk_update_request.rb
@@ -8,7 +8,6 @@ class BulkUpdateRequest < ApplicationRecord
   belongs_to :forum_post, optional: true
   belongs_to :approver, optional: true, class_name: "User"
 
-  before_validation :normalize_text
   validates_presence_of :reason, on: :create
   validates_presence_of :script
   validates_presence_of :title, if: ->(rec) {rec.forum_topic_id.blank?}
@@ -117,10 +116,6 @@ class BulkUpdateRequest < ApplicationRecord
   extend SearchMethods
   include ApprovalMethods
 
-  def normalize_text
-    self.script = script.downcase
-  end
-
   def update_tags
     self.tags = processor.affected_tags
   end
diff --git a/test/unit/bulk_update_request_test.rb b/test/unit/bulk_update_request_test.rb
index 7351a22be..d4154e127 100644
--- a/test/unit/bulk_update_request_test.rb
+++ b/test/unit/bulk_update_request_test.rb
@@ -65,6 +65,16 @@ class BulkUpdateRequestTest < ActiveSupport::TestCase
           assert_equal(false, @bur.valid?)
           assert_equal(["Can't create alias bbb -> aaa (A tag alias for aaa already exists)"], @bur.errors.full_messages)
         end
+
+        should "be case-insensitive" do
+          @bur = create(:bulk_update_request, script: "CREATE ALIAS AAA -> BBB")
+          @bur.approve!(@admin)
+          perform_enqueued_jobs
+
+          @alias = TagAlias.find_by(antecedent_name: "aaa", consequent_name: "bbb")
+          assert_equal(true, @alias.present?)
+          assert_equal(true, @alias.is_active?)
+        end
       end
 
       context "the create implication command" do
@@ -161,6 +171,16 @@ class BulkUpdateRequestTest < ActiveSupport::TestCase
         should "update the tags" do
           assert_equal("bar", @post.reload.tag_string)
         end
+
+        should "be case-sensitive" do
+          @post = create(:post, source: "imageboard")
+          @bur = create(:bulk_update_request, script: "mass update source:imageboard -> source:Imageboard")
+
+          @bur.approve!(@admin)
+          perform_enqueued_jobs
+
+          assert_equal("Imageboard", @post.reload.source)
+        end
       end
     end
 
@@ -294,10 +314,6 @@ class BulkUpdateRequestTest < ActiveSupport::TestCase
         assert_equal("pending", @req.status)
       end
 
-      should "downcase the text" do
-        assert_equal("create alias aaa -> bbb", @req.script)
-      end
-
       should "update the topic when processed" do
         assert_difference("ForumPost.count") do
           @req.approve!(@admin)