diff --git a/lib/language_pack/base.rb b/lib/language_pack/base.rb
index c57ae0324..c0fdea319 100644
--- a/lib/language_pack/base.rb
+++ b/lib/language_pack/base.rb
@@ -112,7 +112,7 @@ def build_release
 
   def write_release_yaml
     release = build_release
-    FileUtils.mkdir("tmp") unless File.exists?("tmp")
+    FileUtils.mkdir("tmp") unless File.exist?("tmp")
     File.open("tmp/heroku-buildpack-release-step.yml", 'w') do |f|
       f.write(release.to_yaml)
     end
diff --git a/lib/language_pack/helpers/bundler_wrapper.rb b/lib/language_pack/helpers/bundler_wrapper.rb
index 64d030cfe..78c3a119c 100644
--- a/lib/language_pack/helpers/bundler_wrapper.rb
+++ b/lib/language_pack/helpers/bundler_wrapper.rb
@@ -239,7 +239,7 @@ def bundler_version_escape_valve!
 
   private
   def fetch_bundler
-    return true if Dir.exists?(bundler_path)
+    return true if Dir.exist?(bundler_path)
 
     topic("Installing bundler #{@version}")
     bundler_version_escape_valve!
diff --git a/lib/language_pack/metadata.rb b/lib/language_pack/metadata.rb
index 44ea8e4a5..85388b05d 100644
--- a/lib/language_pack/metadata.rb
+++ b/lib/language_pack/metadata.rb
@@ -26,7 +26,7 @@ def read(key)
 
   def exists?(key)
     full_key = "#{FOLDER}/#{key}"
-    File.exist?(full_key) && !Dir.exists?(full_key)
+    File.exist?(full_key) && !Dir.exist?(full_key)
   end
   alias_method :include?, :exists?