diff --git a/scripts/functions.sh b/scripts/functions.sh
index 1c61168..6b574df 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -56,20 +56,3 @@ fi
 # Remove Duniter package
 sudo dpkg -r duniter
 }
-
-# Find a free port and return it
-#
-# example: port=$(ynh_find_port 8080)
-#
-# usage: ynh_find_port begin_port
-# | arg: begin_port - port to start to search
-ynh_find_port () {
-	port=$1
-	test -n "$port" || ynh_die "The argument of ynh_find_port must be a valid port."
-	while netcat -z 127.0.0.1 $port       # Check if the port is free
-	do
-		port=$((port+1))	# Else, pass to next port
-	done
-	echo $port
-}
-
diff --git a/scripts/install b/scripts/install
index ebb64fb..d3584e1 100755
--- a/scripts/install
+++ b/scripts/install
@@ -22,7 +22,10 @@ sudo yunohost app checkurl "${domain}${path}" -a "$app" \
     || ynh_die "Path not available: ${domain}${path}"
 
 # Check port availability
-port=$(ynh_find_port $port)
+sudo yunohost app checkport $port
+if [[ ! $? -eq 0 ]]; then
+  ynh_die "Port not available: ${port}"
+fi
 
 # Check node availability
 if curl --output /dev/null --silent --head --fail "$sync_node:$sync_port/node/summary"; then