diff --git a/examples/doc-examples/example_quic_transport.py b/examples/doc-examples/example_quic_transport.py
index da2f5395..2ec45c2d 100644
--- a/examples/doc-examples/example_quic_transport.py
+++ b/examples/doc-examples/example_quic_transport.py
@@ -21,7 +21,7 @@ async def main():
 
     # Configure the listening address
     port = 8000
-    listen_addr = multiaddr.Multiaddr(f"/ip4/0.0.0.0/udp/{port}/quic-v1")
+    listen_addr = multiaddr.Multiaddr(f"/ip4/127.0.0.1/udp/{port}/quic-v1")
 
     # Start the host
     async with host.run(listen_addrs=[listen_addr]):
diff --git a/examples/echo/echo_quic.py b/examples/echo/echo_quic.py
index 667a50dc..700db1de 100644
--- a/examples/echo/echo_quic.py
+++ b/examples/echo/echo_quic.py
@@ -48,8 +48,8 @@ async def run_server(port: int, seed: int | None = None) -> None:
     if port <= 0:
         port = find_free_port()
 
-    # For QUIC, we need to use UDP addresses
-    listen_addr = Multiaddr(f"/ip4/0.0.0.0/udp/{port}/quic")
+    # For QUIC, we need to use UDP addresses - use loopback for security
+    listen_addr = Multiaddr(f"/ip4/127.0.0.1/udp/{port}/quic")
 
     if seed:
         import random