diff --git a/build_wasm.sh b/build_wasm.sh
index a993dbd3..7d39e985 100644
--- a/build_wasm.sh
+++ b/build_wasm.sh
@@ -1,3 +1,3 @@
 rm -rf web/lib/
 mkdir -p web/lib/
-em++ src/main.cpp -fno-rtti -fexceptions -sEXIT_RUNTIME -O3 -sMODULARIZE -sEXPORTED_FUNCTIONS=_repl_input,_repl_start,_pkpy_delete,_pkpy_new_repl,_pkpy_repl_input,_pkpy_new_tvm,_pkpy_tvm_exec_async,_pkpy_tvm_get_state,_pkpy_tvm_read_jsonrpc_request,_pkpy_tvm_reset_state,_pkpy_tvm_terminate,_pkpy_tvm_write_jsonrpc_response,_pkpy_new_vm,_pkpy_vm_add_module,_pkpy_vm_eval,_pkpy_vm_exec,_pkpy_vm_get_global,_pkpy_vm_read_output -sEXPORTED_RUNTIME_METHODS=ccall,cwrap -o web/lib/pocketpy.js
\ No newline at end of file
+em++ src/main.cpp -fno-rtti -fexceptions -O3 -sEXPORTED_FUNCTIONS=_pkpy_delete,_pkpy_new_repl,_pkpy_repl_input,_pkpy_new_tvm,_pkpy_tvm_exec_async,_pkpy_tvm_get_state,_pkpy_tvm_read_jsonrpc_request,_pkpy_tvm_reset_state,_pkpy_tvm_terminate,_pkpy_tvm_write_jsonrpc_response,_pkpy_new_vm,_pkpy_vm_add_module,_pkpy_vm_eval,_pkpy_vm_exec,_pkpy_vm_get_global,_pkpy_vm_read_output -sEXPORTED_RUNTIME_METHODS=ccall -o web/lib/pocketpy.js
\ No newline at end of file
diff --git a/plugins/flutter/example/pubspec.lock b/plugins/flutter/example/pubspec.lock
index 35b8c427..ad2de5cc 100644
--- a/plugins/flutter/example/pubspec.lock
+++ b/plugins/flutter/example/pubspec.lock
@@ -67,6 +67,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.5"
   matcher:
     dependency: transitive
     description:
diff --git a/plugins/flutter/lib/web.dart b/plugins/flutter/lib/web.dart
new file mode 100644
index 00000000..b881cb83
--- /dev/null
+++ b/plugins/flutter/lib/web.dart
@@ -0,0 +1,5 @@
+import 'package:js/js.dart';
+
+@JS("Module.ccall")
+external int ccall(String name, String returnType, List<String> argTypes,
+    List<dynamic> args);
diff --git a/plugins/flutter/pubspec.yaml b/plugins/flutter/pubspec.yaml
index 004262e6..58e9ed3b 100644
--- a/plugins/flutter/pubspec.yaml
+++ b/plugins/flutter/pubspec.yaml
@@ -12,6 +12,7 @@ dependencies:
   flutter:
     sdk: flutter
   ffi: ^2.0.1
+  js: ^0.6.5
 
 dev_dependencies:
   flutter_test:
diff --git a/plugins/flutter/src/pocketpy.h b/plugins/flutter/src/pocketpy.h
index ba6e3f12..a096a75c 100644
--- a/plugins/flutter/src/pocketpy.h
+++ b/plugins/flutter/src/pocketpy.h
@@ -6784,6 +6784,7 @@ void __initializeBuiltinFunctions(VM* _vm) {
 #elif defined(__EMSCRIPTEN__) || defined(__wasm__) || defined(__wasm32__) || defined(__wasm64__)
 #include <emscripten.h>
 #define __EXPORT EMSCRIPTEN_KEEPALIVE
+#define __NO_MAIN
 #else
 #define __EXPORT
 #endif
diff --git a/plugins/godot/godot-cpp b/plugins/godot/godot-cpp
index 0024722d..d3e448cd 160000
--- a/plugins/godot/godot-cpp
+++ b/plugins/godot/godot-cpp
@@ -1 +1 @@
-Subproject commit 0024722da6796a9f5c954bba2d0b617c602106c7
+Subproject commit d3e448cdbca422c2c9af45b46d8371f66139e12e
diff --git a/src/main.cpp b/src/main.cpp
index 6b4068da..e3f9c0fc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -22,19 +22,6 @@ struct Timer{
     }
 };
 
-#if defined(__EMSCRIPTEN__) || defined(__wasm__) || defined(__wasm32__) || defined(__wasm64__)
-
-// these code is for demo use, feel free to modify it
-REPL* _repl;
-extern "C" {
-    __EXPORT
-    void repl_start(){ _repl = pkpy_new_repl(pkpy_new_vm(true));}
-    __EXPORT
-    bool repl_input(const char* line){ return pkpy_repl_input(_repl, line) == NEED_MORE_LINES;}
-}
-#else
-
-
 void _tvm_dispatch(ThreadedVM* vm){
     while(pkpy_tvm_get_state(vm) != THREAD_FINISHED){
         if(pkpy_tvm_get_state(vm) == THREAD_SUSPENDED){
@@ -59,6 +46,7 @@ void _tvm_dispatch(ThreadedVM* vm){
     }
 }
 
+#ifndef __NO_MAIN
 
 int main(int argc, char** argv){
     if(argc == 1){
diff --git a/src/pocketpy.h b/src/pocketpy.h
index 88ec922c..3ed554b6 100644
--- a/src/pocketpy.h
+++ b/src/pocketpy.h
@@ -592,6 +592,7 @@ void __initializeBuiltinFunctions(VM* _vm) {
 #elif defined(__EMSCRIPTEN__) || defined(__wasm__) || defined(__wasm32__) || defined(__wasm64__)
 #include <emscripten.h>
 #define __EXPORT EMSCRIPTEN_KEEPALIVE
+#define __NO_MAIN
 #else
 #define __EXPORT
 #endif
diff --git a/web/index.js b/web/index.js
index 6e4198c6..90512986 100644
--- a/web/index.js
+++ b/web/index.js
@@ -3,6 +3,7 @@ const term = new Terminal();
 var command = "";
 var need_more_lines = false;
 var stopped = false;
+var repl = 0;
 
 var Module = {
     'print': function(text) { 
@@ -12,7 +13,8 @@ var Module = {
       term.write(text + "\r\n");
     },
     'onRuntimeInitialized': function(text) { 
-      Module.ccall('repl_start', null, [], []);
+      var vm = Module.ccall('pkpy_new_vm', 'number', ['boolean'], [true]);
+      repl = Module.ccall('pkpy_new_repl', 'number', ['number'], [vm]);
       term.write(need_more_lines ? "... " : ">>> ");
     },
     'onAbort': function(text) { 
@@ -32,7 +34,7 @@ function term_init() {
             term.write("Bye!\r\n");
             break;
           }
-          need_more_lines = Module.ccall('repl_input', Boolean, ['string'], [command]);
+          need_more_lines = Module.ccall('pkpy_repl_input', 'number', ['number', 'string'], [repl, command]) == 0;
           command = '';
           term.write(need_more_lines ? "... " : ">>> ");
           break;