diff --git a/.rubocop.yml b/.rubocop.yml
index 838b3d0bee..e5239063ac 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -191,6 +191,9 @@ Lint/StringConversionInInterpolation:
 Lint/UriEscapeUnescape:
   Enabled: true
 
+Lint/DeprecatedClassMethods:
+  Enabled: true
+
 Style/ParenthesesAroundCondition:
   Enabled: true
 
diff --git a/actiontext/lib/templates/installer.rb b/actiontext/lib/templates/installer.rb
index ee5a5af75b..dc549a8af3 100644
--- a/actiontext/lib/templates/installer.rb
+++ b/actiontext/lib/templates/installer.rb
@@ -14,7 +14,7 @@
 
 APPLICATION_PACK_PATH = "app/javascript/packs/application.js"
 
-if File.exists?(APPLICATION_PACK_PATH) && File.read(APPLICATION_PACK_PATH) !~ /import "actiontext"/
+if File.exist?(APPLICATION_PACK_PATH) && File.read(APPLICATION_PACK_PATH) !~ /import "actiontext"/
   say "Adding import to default JavaScript pack"
   append_to_file APPLICATION_PACK_PATH, <<-EOS
 import "actiontext"