java.lang.NoSuchMethodError Coming

[Tushar7262]

Team, I am trying to integrate library as jar in my maven project.
The project compiles successfully and send mail as well.
But one warning is coming during execution of project.
[WARNING] java.lang.NoSuchMethodError: okio.BufferedSource.readUtf8LineStrict(J)Ljava/lang/String; at okhttp3.internal.http1.Http1Codec.readHeaderLine (Http1Codec.java:215) at okhttp3.internal.http1.Http1Codec.readResponseHeaders (Http1Codec.java:189) at okhttp3.internal.http.CallServerInterceptor.intercept (CallServerInterceptor.java:88) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147) at okhttp3.internal.connection.ConnectInterceptor.intercept (ConnectInterceptor.java:45) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:121) at okhttp3.internal.cache.CacheInterceptor.intercept (CacheInterceptor.java:93) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:121) at okhttp3.internal.http.BridgeInterceptor.intercept (BridgeInterceptor.java:93) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147) at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept (RetryAndFollowUpInterceptor.java:126) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:121) at com.pepipost.api.http.client.HttpRedirectInterceptor.intercept (HttpRedirectInterceptor.java:30) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:147) at okhttp3.internal.http.RealInterceptorChain.proceed (RealInterceptorChain.java:121) at okhttp3.RealCall.getResponseWithInterceptorChain (RealCall.java:254) at okhttp3.RealCall$AsyncCall.execute (RealCall.java:200) at okhttp3.internal.NamedRunnable.run (NamedRunnable.java:32) at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:624) at java.lang.Thread.run (Thread.java:748)