SSL exception on browsermob proxy

ERROR 2015-11-28T14:02:34,418 org.littleshoot.proxy.impl.ClientToProxyConnection] (LittleProxy-0-ClientToProxyWorker-3) (AWAITING_INITIAL) [id: 0x1db9cf60, /0:0:0:0:0:0:0:1:53483 => /0:0:0:0:0:0:0:1:8081]: Caught an exception on ClientToProxyConnection io.netty.handler.codec.DecoderException: javax.net.ssl.SSLException: Received fatal alert: unknown_ca
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:358) ~[browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:230) ~[browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) [browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:112) [browsermob-dist-2.1.0-beta-3.jar:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45]
Caused by: javax.net.ssl.SSLException: Received fatal alert: unknown_ca
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:208) ~[?:1.8.0_45]
	at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1666) ~[?:1.8.0_45]
	at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1634) ~[?:1.8.0_45]
	at sun.security.ssl.SSLEngineImpl.recvAlert(SSLEngineImpl.java:1800) ~[?:1.8.0_45]
	at sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:1083) ~[?:1.8.0_45]
	at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:907) ~[?:1.8.0_45]
	at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:781) ~[?:1.8.0_45]
	at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624) ~[?:1.8.0_45]
	at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1135) ~[browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1025) ~[browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:960) ~[browsermob-dist-2.1.0-beta-3.jar:?]
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:327) ~[browsermob-dist-2.1.0-beta-3.jar:?]
	... 11 more