diff --git a/ios/GBPing/GBPing.m b/ios/GBPing/GBPing.m
index 8d1a7d2..d0ef870 100755
--- a/ios/GBPing/GBPing.m
+++ b/ios/GBPing/GBPing.m
@@ -372,7 +372,11 @@ - (void)listenOnce
     enum { kBufferSize = 65535 };
 
     buffer = malloc(kBufferSize);
-    assert(buffer);
+
+    if (buffer == nil) {
+        err = errno;
+        return;
+    }
 
     //set socket timeout
     struct timeval tv;
@@ -381,7 +385,7 @@ - (void)listenOnce
     if (setsockopt(self.socket, SOL_SOCKET, SO_RCVTIMEO,&tv,sizeof(tv)) < 0) {
         NSLog(@"Set Timeput Error");
     }
-    
+
     //read the data.
     addrLen = sizeof(addr);
     bytesRead = recvfrom(self.socket, buffer, kBufferSize, 0, (struct sockaddr *)&addr, &addrLen);
@@ -402,7 +406,11 @@ - (void)listenOnce
             NSMutableData *packet;
 
             packet = [NSMutableData dataWithBytes:buffer length:(NSUInteger)bytesRead];
-            assert(packet);
+
+            if (packet == nil) {
+                err = errno;
+                return;
+            }
 
             //complete the ping summary
             const struct ICMPHeader *headerPointer;
@@ -523,7 +531,8 @@ - (void)sendPing
                 packet = [self pingPacketWithType:kICMPv6TypeEchoRequest payload:payload requiresChecksum:NO];
             } break;
             default: {
-                assert(NO);
+                err = errno;
+                return;
             } break;
         }
 
@@ -791,7 +800,6 @@ - (BOOL)isValidPingResponsePacket:(NSMutableData *)packet
             result = [self isValidPing6ResponsePacket:packet];
         } break;
         default: {
-            assert(NO);
             result = NO;
         } break;
     }
@@ -882,7 +890,7 @@ - (NSData *)pingPacketWithType:(uint8_t)type payload:(NSData *)payload requiresC
     ICMPHeader *icmpPtr;
 
     packet = [NSMutableData dataWithLength:sizeof(*icmpPtr) + payload.length];
-    assert(packet != nil);
+    if (packet == nil) { return nil; }
 
     icmpPtr = packet.mutableBytes;
     icmpPtr->type = type;
diff --git a/ios/RNReactNativePing.m b/ios/RNReactNativePing.m
index 8ea69cc..d48e2c7 100644
--- a/ios/RNReactNativePing.m
+++ b/ios/RNReactNativePing.m
@@ -43,9 +43,11 @@ - (dispatch_queue_t)methodQueue
         unsigned long long payloadSize = nsPayloadSize.unsignedLongLongValue;
         ping.payloadSize = payloadSize;
     }
+    __block BOOL callbackCalled = NO;
 
     [ping setupWithBlock:^(BOOL success, NSError *_Nullable err) {
         if (!success) {
+            callbackCalled = YES;
             reject(@(err.code).stringValue,err.domain,err);
             return;
         }
@@ -53,14 +55,21 @@ - (dispatch_queue_t)methodQueue
             if (!ping) {
                 return;
             }
-            resolve(@(@(summary.rtt * 1000).intValue));
+            if (!callbackCalled) {
+                callbackCalled = YES;
+                resolve(@(@(summary.rtt * 1000).intValue));
+            }
+            
             [ping stop];
             ping = nil;
         } fail:^(NSError *_Nonnull error) {
             if (!ping) {
                 return;
             }
-            reject(@(error.code).stringValue,error.domain,error);
+            if (!callbackCalled) {
+                callbackCalled = YES;
+                reject(@(error.code).stringValue,error.domain,error);
+            }
             [ping stop];
             ping = nil;
         }];
@@ -70,7 +79,11 @@ - (dispatch_queue_t)methodQueue
             }
             ping = nil;
             DEFINE_NSError(timeoutError,PingUtil_Message_Timeout)
-            reject(@(timeoutError.code).stringValue,timeoutError.domain,timeoutError);
+            
+            if (!callbackCalled) {
+                callbackCalled = YES;
+                reject(@(timeoutError.code).stringValue,timeoutError.domain,timeoutError);
+            }
         });
     }];
 }