The versions used for repackaging are:
okhttp-2.0.0.jar
okhttp-urlconnection-2.0.0.jar
okio-1.0.1.jar
Don't forget to change your proguard file from:
-dontwarn okio.**
to
-dontwarn com.squareup.okio.**
You can download the repackaged libraries here: OKHttp OKHttpUrlconnection Okio
credits to Jake Wharton for the repackage script.