diff --git a/packages/mobile/ios/Quiet/AppDelegate.m b/packages/mobile/ios/Quiet/AppDelegate.m
index 31e1d3cf65..0d57cef630 100644
--- a/packages/mobile/ios/Quiet/AppDelegate.m
+++ b/packages/mobile/ios/Quiet/AppDelegate.m
@@ -127,12 +127,13 @@ - (void) spinupBackend:(BOOL)init {
   // (1/6) Find ports to use in tor and backend configuration
   
   FindFreePort *findFreePort = [FindFreePort new];
+  Utils *utils = [Utils new];
     
-  self.dataPort             = [findFreePort getFirstStartingFromPort:11000];
   if (self.socketIOSecret == nil) {
-      self.socketIOSecret       = randomStringWithLength(20);
+      self.socketIOSecret       = [utils generateRandomStringWithLength:(20)];
   }
   
+  self.dataPort             = [findFreePort getFirstStartingFromPort:11000];
   uint16_t socksPort        = [findFreePort getFirstStartingFromPort:12000];
   uint16_t controlPort      = [findFreePort getFirstStartingFromPort:14000];
   uint16_t httpTunnelPort   = [findFreePort getFirstStartingFromPort:16000];
diff --git a/packages/mobile/ios/Utils.swift b/packages/mobile/ios/Utils.swift
new file mode 100644
index 0000000000..55dc4b1d37
--- /dev/null
+++ b/packages/mobile/ios/Utils.swift
@@ -0,0 +1,17 @@
+@objc(Utils)
+class Utils: NSObject {
+
+    @objc
+    func generateRandomString(length: Int) -> String {
+    let letters = "0123456789"
+    var randomString = String()
+
+    for _ in 0..<length {
+        let rand = Int(arc4random_uniform(UInt32(letters.count)))
+        let character = letters[letters.index(letters.startIndex, offsetBy: rand)]
+        randomString.append(character)
+    }
+
+    return randomString
+}
+}
\ No newline at end of file