diff --git a/Classes/API/SERequestHandlerURLSessionDelegate.m b/Classes/API/SERequestHandlerURLSessionDelegate.m
index 606c65c..1075275 100644
--- a/Classes/API/SERequestHandlerURLSessionDelegate.m
+++ b/Classes/API/SERequestHandlerURLSessionDelegate.m
@@ -41,6 +41,7 @@ - (void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticat
     } else {
         [[challenge sender] cancelAuthenticationChallenge:challenge];
         completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
+        NSLog(@"*** SSL Pinning FAILED *** Request to %@://%@ cancelled.", challenge.protectionSpace.protocol, challenge.protectionSpace.host);
     }
 }