diff --git a/components/endpoints/class.param.js b/components/endpoints/class.param.js
old mode 100644
new mode 100755
index 27613f9..7ff19ad
--- a/components/endpoints/class.param.js
+++ b/components/endpoints/class.param.js
@@ -48,6 +48,7 @@ module.exports = class Param {
                     min: Joi.number().default(0),
                     max: Joi.number().default(100),
                     //default: Joi.number().allow(null).default(null)
+                    colorGradient: Joi.array().items(Joi.string().min(1)).default([]),
                 })
             }, {
                 is: "string",
diff --git a/index.js b/index.js
index eb8a548..af27bb4 100644
--- a/index.js
+++ b/index.js
@@ -63,7 +63,9 @@ process.env = Object.assign({
     CONNECT_TIMEOUT: "10000",
     HTTP_TRUSTED_PROXYS: "loopback",
     ITEM_LIMITS: "",
-    WORKER_THREADS_ENABLED: "false"
+    WORKER_THREADS_ENABLED: "false",
+    BIN_PATH_TAR: "/usr/bin/tar",
+    BIN_PATH_NPM: "/usr/bin/npm"
 }, env.parsed, process.env);
 
 
diff --git a/routes/router.api.plugins.js b/routes/router.api.plugins.js
index cd3eda6..ca3f309 100644
--- a/routes/router.api.plugins.js
+++ b/routes/router.api.plugins.js
@@ -1,6 +1,6 @@
 const path = require("path");
 const { pipeline } = require("stream");
-const { exec } = require("child_process");
+const { spawn } = require("child_process");
 const process = require("process");
 const fs = require("fs/promises");
 const { statSync } = require("fs");
@@ -94,7 +94,7 @@ module.exports = (app, router) => {
         }
 
         //let p = path.resolve(process.cwd(), "plugins", req.item.uuid);
-        let tar = exec(`tar vzxf - -C ${req.folder}`);
+        let tar = spawn(process.env.BIN_PATH_TAR, ["-vzxf", "-", "-C", req.folder]);
 
         tar.once("exit", (code) => {
 
@@ -136,7 +136,7 @@ module.exports = (app, router) => {
 
                 }
 
-                let npm = exec(`npm install --omit=dev`, {
+                let npm = spawn(process.env.BIN_PATH_NPM, ["install", "--omit=dev"], {
                     env: {
                         ...process.env,
                         NODE_ENV: "production",