diff --git a/Rakefile b/Rakefile
index 4b8686b..06ebdc4 100644
--- a/Rakefile
+++ b/Rakefile
@@ -20,7 +20,7 @@ task :update_gemfiles do
 
     lockfile = "#{gemfile}.lock"
 
-    if File.exists? lockfile
+    if File.exist? lockfile
       parsed_lockfile = Bundler::LockfileParser.new(Bundler.read_file(lockfile))
       # Ensure lockfile has x86_64-linux
       if parsed_lockfile.platforms.map(&:to_s).none? {|p| p == 'x86_64-linux' }
@@ -33,4 +33,4 @@ task :update_gemfiles do
       raise StandardError.new("Expected #{lockfile} to exist.")
     end
   end
-end
\ No newline at end of file
+end