diff --git a/docker-for-mac/apple-m1.md b/docker-for-mac/apple-m1.md
index 276558ba2d..a7b1e78387 100644
--- a/docker-for-mac/apple-m1.md
+++ b/docker-for-mac/apple-m1.md
@@ -43,6 +43,8 @@ The tech preview of Docker Desktop for Apple M1 currently has the following limi
 
 - The kernel may panic. If so, look in `~/Library/Containers/com.docker.docker/Data/vms/0/console.log` for a BUG or kernel panic to report.
 
+- The new Apple Virtualization framework uses port 53 (DNS) when Docker Desktop is started. This port cannot be used to bind a container port to the host.
+
 ## Fixes since the Apple Silicon preview 7
 
 **Docker Desktop preview 3.1.0 (60984)**