diff --git a/extension/bg.js b/extension/bg.js
index b02aacc..98bd2fb 100644
--- a/extension/bg.js
+++ b/extension/bg.js
@@ -37,12 +37,9 @@ const CMDS = {
   switchTab() {
     chrome.tabs.query({}, function (tabs) {
       state.port.postMessage({
-        'cmd': 'dmenu',
         'info': 'switchTab',
-        'param': {
-          'rofi-opts': ['-i', '-p', 'tab'],
-          'opts': tabs.map(e => (e.id) + ': ' + e.title + ' ::: ' + e.url),
-        }
+        'rofi_flags': ['-i', '-p', 'tab'],
+        'choices': tabs.map(e => (e.id) + ': ' + e.title + ' ::: ' + e.url),
       });
     });
   },
@@ -50,12 +47,9 @@ const CMDS = {
   openHistory() {
     refreshHistory(function (results) {
       state.port.postMessage({
-        'cmd': 'dmenu',
         'info': 'openHistory',
-        'param': {
-          'rofi-opts': ['-matching', 'normal', '-i', '-p', 'history'],
-          'opts': results.map(e => e.title + ' ::: ' + e.url),
-        }
+        'rofi_flags': ['-matching', 'normal', '-i', '-p', 'history'],
+        'choices': results.map(e => e.title + ' ::: ' + e.url),
       });
     });
   },
@@ -71,12 +65,9 @@ const CMDS = {
 
       refreshHistory(function (results) {
         state.port.postMessage({
-          'cmd': 'dmenu',
           'info': 'changeToPage',
-          'param': {
-            'rofi-opts': ['-matching', 'normal', '-i', '-p', 'page'],
-            'opts': results.filter(e => e.url.indexOf(pageOrigin) === 0).map(e => e.title + ' ::: ' + e.url),
-          }
+          'rofi_flags': ['-matching', 'normal', '-i', '-p', 'page'],
+          'choices': results.filter(e => e.url.indexOf(pageOrigin) === 0).map(e => e.title + ' ::: ' + e.url),
         });
       });
     });
@@ -86,6 +77,7 @@ const CMDS = {
 /*** listeners ***/
 
 function onNativeMessage(message) {
+  console.log({ message });
   if (message.info === 'switchTab' && message.result !== '') {
     goToTab(parseInt(message.result.split(': ')[0]));
   } else if (message.info === 'openHistory' && message.result !== '') {
@@ -149,4 +141,5 @@ function main() {
   addChromeListeners();
 };
 
-main();
\ No newline at end of file
+main();
+
diff --git a/extension/manifest.json b/extension/manifest.json
index 55c3400..7309503 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -31,4 +31,5 @@
       "description": "go to last tab"
     }
   }
-}
\ No newline at end of file
+}
+
diff --git a/host/main.py b/host/main.py
index aef4ef7..b893413 100755
--- a/host/main.py
+++ b/host/main.py
@@ -1,61 +1,48 @@
-#!/usr/bin/python2
+#!/usr/bin/env python3
 
-import struct
 import sys
 import json
 import subprocess
+from typing import TypedDict, Any
 
-def send_message(message):
-  sys.stdout.write(struct.pack('I', len(message)))
-  sys.stdout.write(message)
-  sys.stdout.flush()
+class Params(TypedDict):
+  rofi_flags: list[str]
+  choices: list[str]
+  info: Any
 
-def log(msg):
-  pass
 
-def call_rofi(param):
-  options = param['opts']
-  rofi_opts = ['rofi', '-dmenu']
-  if 'rofi-opts' in param:
-    rofi_opts.extend(param['rofi-opts'])
+def send_message(message: bytes):
+  _written = sys.stdout.buffer.write(len(message).to_bytes(4, byteorder='little'))
+  _written = sys.stdout.buffer.write(message)
+  _none = sys.stdout.flush()
 
-  sh = subprocess.Popen(rofi_opts, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
-  sh.stdin.write('\n'.join(map(lambda x: x.encode('utf8'), options)))
-  sh.stdin.flush()
-  sh.stdin.close()
 
-  return sh.stdout.read().strip()
+def call_rofi(param: Params):
+  rofi_cmd = ['rofi', '-dmenu'] + param['rofi_flags']
+  choices = param['choices']
+
+  sh = subprocess.Popen(rofi_cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
+  stdout, _stderr = sh.communicate('\n'.join(choices).encode('raw_unicode_escape'))
+
+  return stdout.decode('raw_unicode_escape')
+
 
 def main():
-  log('launched')
   while True:
-    data_length_bytes = sys.stdin.read(4)
+    data_length_bytes = sys.stdin.buffer.read(4).decode('raw_unicode_escape')
 
     if len(data_length_bytes) == 0:
       break
-    
-    data_length = struct.unpack('i', data_length_bytes)[0]
-    data = sys.stdin.read(data_length).decode('utf-8')
-    data = json.loads(data)
-    log(data)
-    
-    cmd = data['cmd']
-    param = data['param']
-    info = data['info']
-    if cmd == 'dmenu':
-      output = {
-        'cmd': 'dmenu',
-        'result': call_rofi(param),
-        'info': info
-      }
-    else:
-      output = {
-        'result': 'unknow command: {}'.foramt(cmd)
-      }
-    send_message(json.dumps(output))
-
-
-  sys.exit(0)
+
+    data_length = int.from_bytes(data_length_bytes.encode('raw_unicode_escape'), byteorder='little')
+    data = sys.stdin.buffer.read(data_length).decode('raw_unicode_escape')
+
+    params: Params = json.loads(data)
+    response = {
+      'result': call_rofi(params),
+      'info': params['info']
+    }
+    send_message(json.dumps(response).encode('raw_unicode_escape'))
 
 
 if __name__ == '__main__':
diff --git a/scripts/install.sh b/scripts/install.sh
index 57a7ffc..8633dd6 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 set -e
 
 OS="$(uname -s)"
@@ -24,9 +24,9 @@ main() {
   print_horizontal_line
 
   # Dependencies
-  printf "${green}Checking Dependencies${none}: python2 rofi\n"
+  printf "${green}Checking Dependencies${none}: python3 rofi\n"
 
-  check_dependency python2 Python2 https://www.python.org
+  check_dependency python3 Python3 https://www.python.org
   check_dependency rofi rofi https://github.com/davatorium/rofi
   
   print_horizontal_line