diff --git a/Rakefile b/Rakefile
index edd33b5..1a2d822 100644
--- a/Rakefile
+++ b/Rakefile
@@ -139,7 +139,7 @@ task :prepare =>
   rm_f "intermediate/ext/cld3/sentence.pb.h"
   rm_f "intermediate/ext/cld3/task_spec.pb.cc"
   rm_f "intermediate/ext/cld3/task_spec.pb.h"
-  sh "cd intermediate && bundle config set path vendor/bundle && bundle install"
+  sh "cd intermediate && bundle config path vendor/bundle && bundle install"
 end
 
 ext_name.each { |name|