diff --git a/urbanopt-core-gem.gemspec b/urbanopt-core-gem.gemspec
index d77304f..13fc6a5 100644
--- a/urbanopt-core-gem.gemspec
+++ b/urbanopt-core-gem.gemspec
@@ -27,5 +27,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'simplecov', '0.22.0'
   spec.add_development_dependency 'simplecov-lcov', '0.8.0'
 
-  spec.add_dependency 'openstudio-extension', '0.8.2'
+  # spec.add_dependency 'openstudio-extension', '0.8.2'
 end