diff --git a/Gemfile.lock b/Gemfile.lock
index 25a7b3d..f5f631f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ PATH
     auto_html (2.1.1)
       gemoji (~> 4.0.0.rc2)
       redcarpet (~> 3.5)
-      rexml (~> 3.2.5)
+      rexml (~> 3.3.9)
       rinku (~> 2.0)
 
 GEM
@@ -12,15 +12,19 @@ GEM
   specs:
     ast (2.4.2)
     diff-lcs (1.4.4)
-    gemoji (4.0.0.rc3)
-    parallel (1.21.0)
-    parser (3.0.3.1)
+    gemoji (4.0.1)
+    json (2.7.5)
+    language_server-protocol (3.17.0.3)
+    parallel (1.26.3)
+    parser (3.3.5.1)
       ast (~> 2.4.1)
-    rainbow (3.0.0)
+      racc
+    racc (1.8.1)
+    rainbow (3.1.1)
     rake (13.0.6)
-    redcarpet (3.5.1)
-    regexp_parser (2.2.0)
-    rexml (3.2.5)
+    redcarpet (3.6.0)
+    regexp_parser (2.9.2)
+    rexml (3.3.9)
     rinku (2.0.6)
     rspec (3.10.0)
       rspec-core (~> 3.10.0)
@@ -37,21 +41,23 @@ GEM
     rspec-support (3.10.3)
     rspec_junit_formatter (0.4.1)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (1.23.0)
+    rubocop (1.68.0)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.0.0.0)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml
-      rubocop-ast (>= 1.12.0, < 2.0)
+      regexp_parser (>= 2.4, < 3.0)
+      rubocop-ast (>= 1.32.2, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.14.0)
-      parser (>= 3.0.1.1)
-    ruby-progressbar (1.11.0)
-    unicode-display_width (2.1.0)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.33.0)
+      parser (>= 3.3.1.0)
+    ruby-progressbar (1.13.0)
+    unicode-display_width (2.6.0)
 
 PLATFORMS
+  ruby
   x86_64-darwin-19
   x86_64-linux
 
diff --git a/auto_html.gemspec b/auto_html.gemspec
index 3976b85..e8db8a4 100644
--- a/auto_html.gemspec
+++ b/auto_html.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |gem|
 
   gem.add_dependency 'gemoji', '~> 4.0.0.rc2'
   gem.add_dependency 'redcarpet', '~> 3.5'
-  gem.add_dependency 'rexml', '~> 3.2.5'
+  gem.add_dependency 'rexml', '~> 3.3.9'
   gem.add_dependency 'rinku', '~> 2.0'
 
   gem.required_ruby_version = '>= 2.5.0'