diff --git a/lib/js_routes/generators/base.rb b/lib/js_routes/generators/base.rb
index e4bd9c6..9ecd484 100644
--- a/lib/js_routes/generators/base.rb
+++ b/lib/js_routes/generators/base.rb
@@ -10,7 +10,7 @@ def application_js_path
       "app/javascript/packs/application.js",
       "app/javascript/controllers/application.js",
     ].find do |path|
-      File.exists?(Rails.root.join(path))
+      File.exist?(Rails.root.join(path))
     end
   end
 end
diff --git a/spec/js_routes/module_types/umd_spec.rb b/spec/js_routes/module_types/umd_spec.rb
index 2e7503d..f15fb97 100644
--- a/spec/js_routes/module_types/umd_spec.rb
+++ b/spec/js_routes/module_types/umd_spec.rb
@@ -79,7 +79,7 @@
     end
 
     it "should not generate file before initialization" do
-      expect(File.exists?(name)).to be_falsey
+      expect(File.exist?(name)).to be_falsey
     end
   end
 end
diff --git a/spec/js_routes/zzz_last_post_rails_init_spec.rb b/spec/js_routes/zzz_last_post_rails_init_spec.rb
index 3010e67..bc61f47 100644
--- a/spec/js_routes/zzz_last_post_rails_init_spec.rb
+++ b/spec/js_routes/zzz_last_post_rails_init_spec.rb
@@ -47,7 +47,7 @@ def evaluate(ctx, file)
   end
 
   it "should generate routes file" do
-    expect(File.exists?(NAME)).to be_truthy
+    expect(File.exist?(NAME)).to be_truthy
   end
 
   it "should not rewrite routes file if nothing changed" do