Rakefile in zlib-crc32_combine-1.0.0 vs Rakefile in zlib-crc32_combine-1.0.1

@@ -8,10 +8,10 @@
     gem.summary = %Q{Add Zlib's crc32_combine and adler32_combine to Ruby's Zlib}
     gem.description = %Q{Add Zlib's crc32_combine and adler32_combine to Ruby's Zlib}
     gem.email = "[e-mail]"
     gem.homepage = "http://github.com/loe/zlib-crc32_combine"
     gem.authors = ["W. Andrew Loe III", "Aaron Patterson"]
-    gem.add_dependency "ffi", ">= 0.5.4"
+    gem.add_dependency "ffi", "~> 0.6.2"
   end
   Jeweler::GemcutterTasks.new
 rescue LoadError
   puts "Jeweler (or a dependency) not available. Install it with: gem install jeweler"
 end