diff --git a/lib/license_finder/package_managers/bower.rb b/lib/license_finder/package_managers/bower.rb
index 5b3f0b8ee..56efa5306 100644
--- a/lib/license_finder/package_managers/bower.rb
+++ b/lib/license_finder/package_managers/bower.rb
@@ -12,7 +12,7 @@ def self.package_management_command
       'bower'
     end
 
-    def prepare_command
+    def self.prepare_command
       'bower install'
     end
 
diff --git a/spec/lib/license_finder/package_managers/bower_spec.rb b/spec/lib/license_finder/package_managers/bower_spec.rb
index eb9e46729..8fb172f0d 100644
--- a/spec/lib/license_finder/package_managers/bower_spec.rb
+++ b/spec/lib/license_finder/package_managers/bower_spec.rb
@@ -22,7 +22,7 @@ module LicenseFinder
     end
 
     it 'should return the correct prepare command' do
-      expect(subject.prepare_command).to eq('bower install')
+      expect(Bower.prepare_command).to eq('bower install')
     end
   end
 end