ruby-mpfr.gemspec in ruby-mpfr-0.0.14 vs ruby-mpfr.gemspec in ruby-mpfr-0.0.15

@@ -20,7 +20,9 @@
   s.extensions    = Dir.glob('ext/**/extconf.rb')
 
   # specify any dependencies here; for example:
   s.add_development_dependency "rspec"
   s.add_development_dependency "yard"
+  s.add_development_dependency "extconf-task"
+  s.add_development_dependency "gmp"
   # s.add_runtime_dependency "rest-client"
 end