diff --git a/install.sh b/install.sh
index 85b34c3d..0c4922bb 100644
--- a/install.sh
+++ b/install.sh
@@ -92,7 +92,7 @@ config_after_install() {
 
     if [[ ${#existing_webBasePath} -lt 4 ]]; then
         if [[ "$existing_hasDefaultCredential" == "true" ]]; then
-            local config_webBasePath=$(gen_random_string 15)
+            local config_webBasePath=$(gen_random_string 18)
             local config_username=$(gen_random_string 10)
             local config_password=$(gen_random_string 10)