diff --git a/minifirewall-start.sh b/minifirewall-start.sh
index 66776da..aa95502 100755
--- a/minifirewall-start.sh
+++ b/minifirewall-start.sh
@@ -322,7 +322,8 @@ fi
 
 ## Eventually, we drop the output traffic
 $NFT add rule inet minifirewall minifirewall_output ct state established,related accept
-$NFT add rule inet minifirewall minifirewall_output drop
+$NFT add rule inet minifirewall minifirewall_output meta l4proto udp drop
+$NFT add rule inet minifirewall minifirewall_output meta l4proto tcp drop
 
 trap - INT TERM EXIT