diff --git a/coldbrew/vpn/models.py b/coldbrew/vpn/models.py
index adcbabe..8ec957a 100644
--- a/coldbrew/vpn/models.py
+++ b/coldbrew/vpn/models.py
@@ -33,8 +33,11 @@ class VPN(models.Model):
 
         self.public_key = get_public_key(self.private_key)
 
-        if not self.port:
-            self.port = random.randint(10000, 40000)
+        while not self.port:
+            port = random.randint(10000, 40000)
+
+            if not VPN.objects.filter(port=port).exists():
+                self.port = port
 
         super().save(*args, **kwargs)