diff --git a/resources/wf_builder.rb b/resources/wf_builder.rb
index 2ae6594..bdae2fd 100644
--- a/resources/wf_builder.rb
+++ b/resources/wf_builder.rb
@@ -70,7 +70,7 @@
     end unless server.nil? || server.empty?
   end
 
-  cacert_pem = ::File.read('/opt/chefdk/embedded/ssl/certs/cacert.pem')
+  cacert_pem = ::File.read(Dir['/opt/chef*/embedded/ssl/certs/cacert.pem'].first)
 
   ruby_block 'configure SSL certificates' do
     block do