diff --git a/repo/src/main.js b/repo/src/main.js
index d747b0b69..4812e4267 100644
--- a/repo/src/main.js
+++ b/repo/src/main.js
@@ -63,6 +63,18 @@ const _backends = {
     lang: "web-python",
     icon: "🐍",
   },
+  "rpc-window": {
+    type: "external",
+    name: "RPC Window",
+    lang: "*",
+    icon: "🌟",
+  },
+  "rpc-worker": {
+    type: "external",
+    name: "RPC Worker",
+    lang: "*",
+    icon: "⚙️",
+  },
   collection: {
     type: "-",
     name: "Collection",
diff --git a/web/package-lock.json b/web/package-lock.json
index 2967d47e6..b37029be9 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "imjoy",
-  "version": "0.10.52",
+  "version": "0.10.53",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -10407,22 +10407,36 @@
       "dev": true
     },
     "imjoy-core": {
-      "version": "0.12.6",
-      "resolved": "https://registry.npmjs.org/imjoy-core/-/imjoy-core-0.12.6.tgz",
-      "integrity": "sha512-pKG6FRTug8W1I9f0F4+fVX4BcHie2RI6gbJ6v5x4exdg7QiwmexJ4se8pq3VoRfXvdCbMgGBRBUzErBHuRkwhQ==",
+      "version": "0.12.7",
+      "resolved": "https://registry.npmjs.org/imjoy-core/-/imjoy-core-0.12.7.tgz",
+      "integrity": "sha512-rYpmeJMVenZVmqltNXpTBggNn3rZt2EtuIZy4rKonSAUs953j0agNYPAcJnEjqDj4uBBWI1k2qE7u4y55m2Uew==",
       "requires": {
         "ajv": "^6.9.1",
         "axios": "^0.18.1",
         "dompurify": "^2.0.8",
         "file-saver": "^1.3.3",
+        "imjoy-rpc": "^0.1.17",
         "js-yaml": "^3.13.1",
         "lodash": "^4.17.15",
         "lz-string": "^1.4.4",
         "minibus": "^3.1.0",
         "pouchdb-browser": "^7.0.0",
         "spark-md5": "^3.0.0"
+      },
+      "dependencies": {
+        "imjoy-rpc": {
+          "version": "0.1.17",
+          "resolved": "https://registry.npmjs.org/imjoy-rpc/-/imjoy-rpc-0.1.17.tgz",
+          "integrity": "sha512-7m/P+3U1F/3AiaZ1O96bzFh7DLp20j19lhagF8/hF2KNxRlUl24ZO2OqobusS/lsN8mVcoxIVmGAiv9wtYf7ZA=="
+        }
       }
     },
+    "imjoy-rpc": {
+      "version": "0.1.12",
+      "resolved": "https://registry.npmjs.org/imjoy-rpc/-/imjoy-rpc-0.1.12.tgz",
+      "integrity": "sha512-yEzUIsNb4b2Ew1dOna3PgubCWipQI9kVh6ZF4QgXGeNQLfjKoYDQORR+gqAmSHjyNEwJCbbnUZEynpBx+6ZG2A==",
+      "dev": true
+    },
     "immediate": {
       "version": "3.0.6",
       "resolved": "https://registry.npmjs.org/immediate/-/immediate-3.0.6.tgz",
diff --git a/web/package.json b/web/package.json
index 88286731e..668d7e145 100644
--- a/web/package.json
+++ b/web/package.json
@@ -1,6 +1,6 @@
 {
   "name": "imjoy",
-  "version": "0.10.52",
+  "version": "0.10.53",
   "private": false,
   "description": "ImJoy -- deep learning made easy.",
   "author": "imjoy-team <imjoy.team@gmail.com>",
@@ -33,7 +33,7 @@
     "axios": "^0.18.1",
     "dompurify": "^2.0.8",
     "file-saver": "^1.3.3",
-    "imjoy-core": "0.12.6",
+    "imjoy-core": "0.12.7",
     "js-yaml": "^3.13.1",
     "lodash": "^4.17.15",
     "marked": "^0.8.0",
@@ -78,6 +78,7 @@
     "eslint-plugin-vue": "^5.0.0-0",
     "gh-pages": "^2.0.1",
     "husky": "^4.2.3",
+    "imjoy-rpc": "^0.1.12",
     "lint-staged": "^10.0.8",
     "mocha": "^5.0.5",
     "mocha-webpack": "^2.0.0-beta.0",
diff --git a/web/src/components/Imjoy.vue b/web/src/components/Imjoy.vue
index 6c11c2cf6..629ac49af 100644
--- a/web/src/components/Imjoy.vue
+++ b/web/src/components/Imjoy.vue
@@ -993,7 +993,6 @@
       draggable=".drag-handle"
       :scrollable="true"
     >
-      <p v-if="!selected_dialog_window">No dialog window available to show</p>
       <template v-for="wdialog in dialogWindows">
         <window
           :key="wdialog.id"
@@ -3061,7 +3060,6 @@ export default {
     },
     showDialog(_plugin, config) {
       config.dialog = true;
-      config.type = config.type || "imjoy/joy";
       return new Promise((resolve, reject) => {
         const _selectedWindow = this.wm.selected_window;
         this.pm
diff --git a/web/vue.config.js b/web/vue.config.js
index c6ab724d0..82b5044a7 100644
--- a/web/vue.config.js
+++ b/web/vue.config.js
@@ -25,8 +25,6 @@ const nojekyll_file = {
   content: ""
 };
 
-const isDevServer = process.env.WEBPACK_DEV_SERVER;
-
 module.exports = {
   runtimeCompiler: true,
   outputDir: './dist',
@@ -68,12 +66,6 @@ module.exports = {
         from: path.join(__dirname, "src/pluginParser.js"),
         to: path.join(__dirname, "dist/static/js/pluginParser.js"),
         toType: "file",
-      },{
-        from: path.join(__dirname, "node_modules/imjoy-core/src/base_frame.html"),
-        to: path.join(__dirname, "dist/base_frame.html"),
-        toType: "file",
-        // only copy base_frame if when dev server is on
-        test: isDevServer? /base_frame\.html$/: /no_base_frame\.html$/
       }]),
       new MonacoWebpackPlugin({output: 'static/vs', languages: ['javascript', 'html', 'css', 'python'], features: ['accessibilityHelp', 'bracketMatching', 'caretOperations', 'clipboard', 'codeAction', 'codelens', 'colorDetector', 'comment', 'contextmenu', 'coreCommands', 'cursorUndo', 'dnd', 'find', 'folding', 'fontZoom', 'format', 'goToDefinitionCommands', 'goToDefinitionMouse', 'gotoError', 'gotoLine', 'hover', 'inPlaceReplace', 'inspectTokens', 'iPadShowKeyboard', 'linesOperations', 'links', 'multicursor', 'parameterHints', 'quickCommand', 'quickOutline', 'referenceSearch', 'rename', 'smartSelect', 'snippets', 'suggest', 'toggleHighContrast', 'toggleTabFocusMode', 'transpose', 'wordHighlighter', 'wordOperations', 'wordPartOperations']}),
       new webpack.DefinePlugin({
@@ -103,12 +95,10 @@ module.exports = {
             // only specify one entry point
             // and require all tests in there
             'tests/*.spec.js',
-            { pattern: 'node_modules/imjoy-core/dist/*', watched: false, included: false, served: true, nocache: false },
             { pattern: 'src/*.js', watched: false, included: false, served: true, nocache: false },
         ],
 
         proxies: {
-            "/base_frame.html": '/base/node_modules/imjoy-core/dist/base_frame.html',
             "/plugin-service-worker.js": "/base/node_modules/imjoy-core/dist/plugin-service-worker.js"
         },