diff --git a/packages/core-js/babel.config.json b/packages/core-js/babel.config.json
index 12fbfa49..ed1f3427 100644
--- a/packages/core-js/babel.config.json
+++ b/packages/core-js/babel.config.json
@@ -4,7 +4,13 @@
             "@babel/preset-env",
             {
                 "corejs": "3.15",
-                "useBuiltIns": "usage"
+                "useBuiltIns": "usage",
+                "targets": {
+                    "browsers": [
+                        "last 5 versions",
+                        "ie >= 8"
+                    ]
+                }
             }
         ]
     ]
diff --git a/packages/core-js/package.json b/packages/core-js/package.json
index 7695727f..a8ef5089 100644
--- a/packages/core-js/package.json
+++ b/packages/core-js/package.json
@@ -20,7 +20,7 @@
     },
     "scripts": {
         "build": "webpack --config webpack.prod.js",
-        "start": "webpack serve --config webpack.dev.js"
+        "dev": "webpack --mode development"
     },
     "devDependencies": {
         "@babel/core": "^7.14.6",
diff --git a/packages/mindplot/babel.config.json b/packages/mindplot/babel.config.json
index 0af3c4b9..ed1f3427 100644
--- a/packages/mindplot/babel.config.json
+++ b/packages/mindplot/babel.config.json
@@ -3,8 +3,14 @@
         [
             "@babel/preset-env",
             {
-                "corejs": "3.9",
-                "useBuiltIns": "usage"
+                "corejs": "3.15",
+                "useBuiltIns": "usage",
+                "targets": {
+                    "browsers": [
+                        "last 5 versions",
+                        "ie >= 8"
+                    ]
+                }
             }
         ]
     ]
diff --git a/packages/mindplot/package.json b/packages/mindplot/package.json
index efd02841..2321c9e9 100644
--- a/packages/mindplot/package.json
+++ b/packages/mindplot/package.json
@@ -21,8 +21,8 @@
     },
     "scripts": {
         "build": "webpack --config webpack.prod.js",
-        "playground": "webpack serve --config webpack.playground.js",
-        "start": "webpack serve --config webpack.dev.js"
+        "dev": "webpack serve --config webpack.dev.js",
+        "playground": "webpack serve --config webpack.playground.js"
     },
     "dependencies": {
         "@wismapping/core-js": "^0.0.1",
diff --git a/packages/web2d/babel.config.json b/packages/web2d/babel.config.json
index 79b97dfa..eb768e59 100644
--- a/packages/web2d/babel.config.json
+++ b/packages/web2d/babel.config.json
@@ -3,10 +3,17 @@
         [
             "@babel/preset-env",
             {
-                "corejs": "3.9",
-                "useBuiltIns": "usage"
+                "corejs": "3.15",
+                "useBuiltIns": "usage",
+                "targets": {
+                    "browsers": [
+                        "last 5 versions",
+                        "ie >= 8"
+                    ]
+                }
             }
-        ] 
+        ]
     ],
     "plugins": ["@babel/plugin-transform-modules-commonjs"]
+
 }
diff --git a/packages/web2d/package.json b/packages/web2d/package.json
index dba5ef7e..f56b9f2d 100644
--- a/packages/web2d/package.json
+++ b/packages/web2d/package.json
@@ -20,7 +20,7 @@
         "url": "git@bitbucket.org:wisemapping/wisemapping-frontend.git"
     },
     "scripts": {
-        "start": "nodemon --watch lib",
+        "dev": "webpack --config webpack.dev.js",
         "build": "webpack --config webpack.prod.js",
         "playground": "webpack serve --config webpack.playground.js"
     },