diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index cae97817d..5f0eaac8e 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config --auto-gen-only-exclude --no-offense-counts --no-auto-gen-timestamp`
-# using RuboCop version 1.76.1.
+# using RuboCop version 1.76.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
diff --git a/Gemfile.lock b/Gemfile.lock
index 95519462f..5f8c685a8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -761,7 +761,7 @@ GEM
       rspec-mocks (~> 3.0)
       sidekiq (>= 5, < 9)
     rspec-support (3.13.3)
-    rubocop (1.76.1)
+    rubocop (1.76.2)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -769,7 +769,7 @@ GEM
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
-      rubocop-ast (>= 1.45.0, < 2.0)
+      rubocop-ast (>= 1.45.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
     rubocop-ast (1.45.1)
diff --git a/app/lib/emoji_formatter.rb b/app/lib/emoji_formatter.rb
index a31353616..c193df9bb 100644
--- a/app/lib/emoji_formatter.rb
+++ b/app/lib/emoji_formatter.rb
@@ -46,12 +46,12 @@ class EmojiFormatter
 
         if inside_shortname && text[i] == ':'
           inside_shortname = false
-          shortcode = text[shortname_start_index + 1..i - 1]
+          shortcode = text[(shortname_start_index + 1)..(i - 1)]
           char_after = text[i + 1]
 
           next unless (char_after.nil? || !DISALLOWED_BOUNDING_REGEX.match?(char_after)) && (emoji = emoji_map[shortcode])
 
-          result << tree.document.create_text_node(text[last_index..shortname_start_index - 1]) if shortname_start_index.positive?
+          result << tree.document.create_text_node(text[last_index..(shortname_start_index - 1)]) if shortname_start_index.positive?
           result << tree.document.fragment(tag_for_emoji(shortcode, emoji))
 
           last_index = i + 1
diff --git a/app/lib/text_formatter.rb b/app/lib/text_formatter.rb
index a7620fb74..45fb06e70 100644
--- a/app/lib/text_formatter.rb
+++ b/app/lib/text_formatter.rb
@@ -58,7 +58,7 @@ class TextFormatter
 
       prefix      = url.match(URL_PREFIX_REGEX).to_s
       display_url = url[prefix.length, 30]
-      suffix      = url[prefix.length + 30..]
+      suffix      = url[(prefix.length + 30)..]
       cutoff      = url[prefix.length..].length > 30
 
       if suffix && suffix.length == 1 # revert truncation to account for ellipsis