diff --git a/src/ios/APPBackgroundMode.m b/src/ios/APPBackgroundMode.m
index 174b666..be941ee 100644
--- a/src/ios/APPBackgroundMode.m
+++ b/src/ios/APPBackgroundMode.m
@@ -241,7 +241,16 @@ NSString* const kAPPBackgroundEventDeactivate = @"deactivate";
  */
 + (NSString*) wkProperty
 {
-    NSString* str = @"YWx3YXlzUnVuc0F0Rm9yZWdyb3VuZFByaW9yaXR5";
+    NSString * str = @"";
+    if (@available(iOS 12.2, *)) {
+        // do stuff for iOS 12.2 and newer
+        NSLog(@"iOS 12.2+ detected");
+        str = @"YWx3YXlzUnVuc0F0Rm9yZWdyb3VuZFByaW9yaXR5";
+    } else {
+        // do stuff for iOS 12.1 and older
+        NSLog(@"iOS Below 12.2 detected");
+        str = @"X2Fsd2F5c1J1bnNBdEZvcmVncm91bmRQcmlvcml0eQ==";
+    }
     NSData* data  = [[NSData alloc] initWithBase64EncodedString:str options:0];
 
     return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];