diff --git a/include/mbgl/ios/MGLMapboxEvents.h b/include/mbgl/ios/MGLMapboxEvents.h
index 2c6f8151b..7a4c45fe1 100644
--- a/include/mbgl/ios/MGLMapboxEvents.h
+++ b/include/mbgl/ios/MGLMapboxEvents.h
@@ -25,7 +25,7 @@ extern NSString *const MGLEventGesturePanStart;
 extern NSString *const MGLEventGesturePinchStart;
 extern NSString *const MGLEventGestureRotateStart;
 
-@interface MGLMapboxEvents : NSObject <NSURLConnectionDelegate>
+@interface MGLMapboxEvents : NSObject <NSURLSessionDelegate>
 
 // You must call these methods from the main thread.
 //
diff --git a/platform/ios/MGLMapboxEvents.m b/platform/ios/MGLMapboxEvents.m
index 4b010463d..42fcaba30 100644
--- a/platform/ios/MGLMapboxEvents.m
+++ b/platform/ios/MGLMapboxEvents.m
@@ -73,6 +73,7 @@ NSString *const MGLEventGestureRotateStart = @"Rotation";
 @property (atomic) NSUInteger flushAt;
 @property (atomic) NSDateFormatter *rfc3339DateFormatter;
 @property (atomic) CGFloat scale;
+@property (atomic) NSURLSession *session;
 @property (atomic) NSData *geoTrustCert;
 
 
@@ -135,6 +136,8 @@ NSString *const MGLEventGestureRotateStart = @"Rotation";
         // Configure Events Infrastructure
         // ===============================
 
+         _session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:nil];
+
         // Load Local Copy of Server's Public Key
         NSString *cerPath = nil;
         NSArray *bundles = [NSBundle allFrameworks];
@@ -417,9 +420,17 @@ NSString *const MGLEventGestureRotateStart = @"Rotation";
             [request setHTTPBody:jsonData];
 
             // Send non blocking HTTP Request to server
-            NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:strongSelf startImmediately:NO];
-            [connection scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
-            [connection start];
+            NSURLSessionDataTask *task = [_session dataTaskWithRequest:request
+                                                     completionHandler: ^(NSData *data, NSURLResponse *response, NSError *error) {
+
+                                                         NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
+                                                         NSLog(@"Response Code =  %ld", (long)httpResponse.statusCode);
+                                                     }];
+            [task resume];
+
+//            NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:strongSelf startImmediately:NO];
+//            [connection scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
+//            [connection start];
         }
     });
 }
@@ -660,6 +671,7 @@ NSString *const MGLEventGestureRotateStart = @"Rotation";
     return result;
 }
 
+/*
 #pragma mark NSURLConnectionDelegate
 - (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
 
@@ -703,5 +715,53 @@ NSString *const MGLEventGestureRotateStart = @"Rotation";
         [[challenge sender] cancelAuthenticationChallenge:challenge];
     }
 }
+*/
+
+#pragma mark NSURLSessionDelegate
+- (void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^) (NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {
+
+    if([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
+
+        SecTrustRef serverTrust = [[challenge protectionSpace] serverTrust];
+        NSString *domain = [[challenge protectionSpace] host];
+        SecTrustResultType trustResult;
+
+        // Validate the certificate chain with the device's trust store anyway
+        // This *might* give use revocation checking
+        SecTrustEvaluate(serverTrust, &trustResult);
+        if (trustResult == kSecTrustResultUnspecified)
+        {
+            // Look for a pinned certificate in the server's certificate chain
+            long numKeys = SecTrustGetCertificateCount(serverTrust);
+
+            BOOL found = false;
+            for (int lc = 0; lc < numKeys; lc++) {
+                SecCertificateRef certificate = SecTrustGetCertificateAtIndex(serverTrust, lc);
+                NSData *remoteCertificateData = CFBridgingRelease(SecCertificateCopyData(certificate));
+
+                // Compare Remote Key With Local Version
+                if ([remoteCertificateData isEqualToData:_geoTrustCert]) {
+                    // Found the certificate; continue connecting
+                    completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
+                    found = true;
+                    break;
+                }
+            }
+
+            if (!found) {
+                // The certificate wasn't found in the certificate chain; cancel the connection
+                completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
+            }
+            NSLog(@"challenge result = %hhd", found);
+        }
+        else
+        {
+            // Certificate chain validation failed; cancel the connection
+            completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
+            NSLog(@"challenge chain validation failed");
+        }
+    }
+    
+}
 
 @end