diff --git a/examples/19-react-18/src/App.jsx b/examples/19-react-18/src/App.jsx
index 25bbdb1..da9238f 100644
--- a/examples/19-react-18/src/App.jsx
+++ b/examples/19-react-18/src/App.jsx
@@ -10,9 +10,8 @@ export const App = () => {
 
   useSsrEffect(() => {
     registerEffect(asyncFn).then((data) => {
-      console.log('test', s);
       setState(data);
-    })
+    });
   }, [s]);
 
   return (
diff --git a/examples/19-react-18/src/server.jsx b/examples/19-react-18/src/server.jsx
index a5adb79..604b4bc 100644
--- a/examples/19-react-18/src/server.jsx
+++ b/examples/19-react-18/src/server.jsx
@@ -8,42 +8,61 @@ import { serverRender } from '@issr/core';
 
 const app = new Koa();
 const router = new Router();
+const ABORT_DELAY = 10000;
 
 app.use(serve(path.resolve(__dirname, '../public')));
 
 router.get('/*', async (ctx) => {
-  ctx.respond = false;
-  ctx.res.statusCode = 200;
-  ctx.response.set('content-type', 'text/html');
+  let didError = false;
 
-  const { stream } = await serverRender.stream(() => (
-    <html lang="en">
-    <head>
-      <meta charSet="utf-8" />
-      <meta name="viewport" content="width=device-width, initial-scale=1" />
-      <meta name="theme-color" content="#000000" />
-      <meta name="description" content="iSSR example with React 18" />
-      <title>Issr</title>
-    </head>
-    <body>
-    <noscript
-      dangerouslySetInnerHTML={{
-        __html: `<b>Enable JavaScript to run this app.</b>`,
-      }}
-    />
-    <div id="root">
-      <App />
-    </div>
-    </body>
-    </html>
-  ), {
-    streamOptionsFn: (state) => ({
-      bootstrapScripts: ['/index.js'],
-      bootstrapScriptContent: `window.SSR_DATA = ${serialize(state, { isJSON: true })}`,
-    })
-  });
+  /**
+   * NOTE: use promise to force koa waiting for streaming.
+   */
+  return new Promise(async (resolve, reject) => {
+    const { stream } = await serverRender.stream(() => (
+      <html lang="en">
+      <head>
+        <meta charSet="utf-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1" />
+        <meta name="theme-color" content="#000000" />
+        <meta name="description" content="iSSR example with React 18" />
+        <title>Issr</title>
+      </head>
+      <body>
+      <noscript
+        dangerouslySetInnerHTML={{
+          __html: `<b>Enable JavaScript to run this app.</b>`,
+        }}
+      />
+      <div id="root">
+        <App />
+      </div>
+      </body>
+      </html>
+    ), {
+      streamOptionsFn: (state) => ({
+        bootstrapScripts: ['/index.js'],
+        bootstrapScriptContent: `window.SSR_DATA = ${serialize(state, { isJSON: true })}`,
+        onShellReady() {
+          ctx.respond = false;
+          ctx.res.statusCode = didError ? 500 : 200;
+          ctx.response.set('content-type', 'text/html');
+          stream.pipe(ctx.res);
+          ctx.res.end();
+          resolve();
+        },
+        onError() {
+          didError = true;
+          reject();
+        },
+      })
+    });
 
-  stream.pipe(ctx.res);
+    setTimeout(() => {
+      stream.abort();
+      reject();
+    }, ABORT_DELAY);
+  });
 });
 
 app
diff --git a/packages/babel-plugin/index.js b/packages/babel-plugin/index.js
index 2d8e09a..4eda84c 100644
--- a/packages/babel-plugin/index.js
+++ b/packages/babel-plugin/index.js
@@ -14,6 +14,7 @@ const createDummy = (globalCache, id, field) => {
       useSsrState: 0,
     };
   }
+
   if (!globalCache[id][field]) {
     globalCache[id][field] = 0;
   }
@@ -52,26 +53,7 @@ const BabelISSRPlugin = (api) => {
 
         const useSsrStateNames = Array.isArray(useSsrStateName) ? useSsrStateName : [useSsrStateName];
 
-        const useSsrEffects = Array.isArray(useSsrEffectName) ? useSsrEffectName : [useSsrEffectName];
-
-        useSsrEffects.forEach((ssrEffectName) => {
-          if (path.node.callee.name === ssrEffectName) {
-            const args = path.node.arguments;
-            const lastItem = args[args.length - 1];
-            const lastItemIsArray = lastItem.type === 'ArrayExpression';
-            const firstItemIsFunction = lastItem.type.indexOf('FunctionExpression') >= 0;
-
-            if (
-              (path.node.arguments.length === 2 && lastItemIsArray) ||
-              (path.node.arguments.length === 1 && firstItemIsFunction)
-            ) {
-              const id = md5(pathNode.relative(cwd, filename));
-              createDummy(globalCache, id, 'useSsrEffect');
-              const effectID = `ssr-effect-${id}-${globalCache[id].useSsrEffect++}`;
-              path.node.arguments.push(t.StringLiteral(effectID));
-            }
-          }
-        });
+        const useSsrEffectNames = Array.isArray(useSsrEffectName) ? useSsrEffectName : [useSsrEffectName];
 
         useRegisterEffectNames.forEach((registerEffect) => {
           if (path.node.callee.name === registerEffect) {
@@ -94,6 +76,25 @@ const BabelISSRPlugin = (api) => {
             }
           }
         });
+
+        useSsrEffectNames.forEach((ssrEffectName) => {
+          if (path.node.callee.name === ssrEffectName) {
+            const args = path.node.arguments;
+            const lastItem = args[args.length - 1];
+            const lastItemIsArray = lastItem.type === 'ArrayExpression';
+            const firstItemIsFunction = lastItem.type.indexOf('FunctionExpression') >= 0;
+
+            if (
+              (path.node.arguments.length === 2 && lastItemIsArray) ||
+              (path.node.arguments.length === 1 && firstItemIsFunction)
+            ) {
+              const id = md5(pathNode.relative(cwd, filename));
+              createDummy(globalCache, id, 'useSsrEffect');
+              const effectID = `ssr-effect-${id}-${globalCache[id].useSsrEffect++}`;
+              path.node.arguments.push(t.StringLiteral(effectID));
+            }
+          }
+        });
       },
     },
   };
diff --git a/packages/core/README.md b/packages/core/README.md
index e7e3a42..0be4930 100644
--- a/packages/core/README.md
+++ b/packages/core/README.md
@@ -12,7 +12,7 @@ The easiest way to move your React application to Server-Side Rendering. Handles
 
 ## Features
 - TypeScript support
-- Extremely small size (5kb)
+- Small size (5kb)
 - Without dependencies
 - **iSSR** supports native setState, Redux (thunk, sagas), Mobx, Apollo and other state management libraries
 
@@ -23,5 +23,3 @@ Copyright (c) Aleksandrov Sergey
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-
