Rakefile in json_pure-1.6.0 vs Rakefile in json_pure-1.6.1

@@ -230,10 +230,10 @@
   if File.exist?(JRUBY_JAR)
     JAVA_SOURCES.each do |src|
       classpath = (Dir['java/lib/*.jar'] << 'java/src' << JRUBY_JAR) * ':'
       obj = src.sub(/\.java\Z/, '.class')
       file obj => src do
-        sh 'javac', '-classpath', classpath, '-source', '1.5', src
+        sh 'javac', '-classpath', classpath, '-source', '1.5', '-target', '1.5', src
       end
       JAVA_CLASSES << obj
     end
   else
     warn "WARNING: Cannot find jruby in path => Cannot build jruby extension!"