diff --git a/scripts/functions.sh b/scripts/functions.sh
index 9dd401b..6a50fe7 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -56,3 +56,20 @@ 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 $port
+}
+
diff --git a/scripts/install b/scripts/install
index d3584e1..ebb64fb 100755
--- a/scripts/install
+++ b/scripts/install
@@ -22,10 +22,7 @@ sudo yunohost app checkurl "${domain}${path}" -a "$app" \
     || ynh_die "Path not available: ${domain}${path}"
 
 # Check port availability
-sudo yunohost app checkport $port
-if [[ ! $? -eq 0 ]]; then
-  ynh_die "Port not available: ${port}"
-fi
+port=$(ynh_find_port $port)
 
 # Check node availability
 if curl --output /dev/null --silent --head --fail "$sync_node:$sync_port/node/summary"; then