diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3133f6b..a4a42b5 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,11 +1,10 @@
 name: CI
 on:
-
   workflow_dispatch:
   pull_request:
   push:
     branches:
-     - main
+    - main
 
   schedule:
     - cron: '0 2 * * *' # run at 2 AM UTC
@@ -17,8 +16,7 @@ jobs:
 
     strategy:
       fail-fast: false
-      matrix:
-        emsdk_ver: ["3.1.45"]
+
 
     steps:
       - uses: actions/checkout@v4
@@ -32,15 +30,6 @@ jobs:
           environment-file: environment-wasm-build.yml
           environment-name: xeus-javascript-wasm-build
 
-      ################################################################
-      #  emsdk itself
-      ################################################################
-      - name: Setup emsdk
-        shell: bash -l {0}
-        run: |
-
-          emsdk install ${{ matrix.emsdk_ver }}
-
       ################################################################
       # C++ build
       ################################################################
@@ -48,15 +37,13 @@ jobs:
         shell: bash -l {0}
         run: |
 
-          emsdk activate ${{ matrix.emsdk_ver }}
 
-          source $CONDA_EMSDK_DIR/emsdk_env.sh
-          micromamba create -f environment-wasm-host.yml --platform=emscripten-wasm32
+
+          micromamba create -f environment-wasm-host.yml --platform=emscripten-wasm32 --yes
 
           mkdir build
           pushd build
 
-          export EMPACK_PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-javascript-wasm-build
           export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-javascript-wasm-host
           export CMAKE_PREFIX_PATH=$PREFIX
           export CMAKE_SYSTEM_PREFIX_PATH=$PREFIX
@@ -97,7 +84,7 @@ jobs:
       # upload to github pages
       ################################################################
       - name: Upload Pages artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: _output
 
@@ -126,4 +113,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v3 # or specific "vX.X.X" version tag for this action
+        uses: actions/deploy-pages@v4 # or specific "vX.X.X" version tag for this action
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7232797..a5d435d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,7 @@
 #The full license is in the file LICENSE, distributed with this software.
 #############################################################################
 
-cmake_minimum_required(VERSION 3.4.3)
+cmake_minimum_required(VERSION 4.0.0)
 project(xeus-javascript)
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake;${CMAKE_MODULE_PATH}")
 
@@ -57,7 +57,7 @@ if(EMSCRIPTEN)
     SET(XEUS_JAVASCRIPT_BUILD_STATIC ON)
     SET(XEUS_JAVASCRIPT_BUILD_SHARED OFF)
     SET(XEUS_JAVASCRIPT_BUILD_EXECUTABLE OFF)
-    SET(XEUS_JAVASCRIPT_USE_SHARED_XEUS OFF)
+    SET(XEUS_JAVASCRIPT_USE_SHARED_XEUS ON)
     SET(XEUS_JAVASCRIPT_USE_SHARED_XEUS_JAVASCRIPT OFF)
     SET(XEUS_JAVASCRIPT_BUILD_TESTS OFF)
 endif()
@@ -261,17 +261,28 @@ if (XEUS_JAVASCRIPT_BUILD_STATIC)
     list(APPEND XEUS_JAVASCRIPT_TARGETS xeus-javascript-static)
 endif ()
 
+target_link_options(xeus-javascript-static
+    PUBLIC "SHELL: -s WASM_BIGINT=1"
+    PUBLIC "SHELL: -s ALLOW_MEMORY_GROWTH=1"
+)
 
 include(WasmBuildOptions)
 
 add_executable(xjavascript src/main_emscripten_kernel.cpp )
-target_compile_options(xjavascript PRIVATE -fPIC)
+target_compile_options(xjavascript
+PRIVATE "-fPIC"
+PUBLIC "SHELL: -s WASM_BIGINT=1"
+PUBLIC "SHELL: -s ALLOW_MEMORY_GROWTH=1"
+)
 XEUS_JAVASCRIPT_set_kernel_options(xjavascript)
 xeus_wasm_compile_options(xjavascript)
 xeus_wasm_link_options(xjavascript "web,worker")
 
 #
 target_link_options(xjavascript
+    PUBLIC "SHELL: -s WASM_BIGINT=1"
+    PUBLIC "SHELL: -s ALLOW_MEMORY_GROWTH=1"
+    PUBLIC "SHELL: -s MAIN_MODULE=1"
     PUBLIC "SHELL: -s NO_EXIT_RUNTIME=1"
     PUBLIC "SHELL: -s FORCE_FILESYSTEM=1"
     PUBLIC "SHELL: --pre-js ${CMAKE_CURRENT_SOURCE_DIR}/src/pre.js"
diff --git a/environment-wasm-build.yml b/environment-wasm-build.yml
index dccaf99..a543748 100644
--- a/environment-wasm-build.yml
+++ b/environment-wasm-build.yml
@@ -1,11 +1,13 @@
 name: xeus-javascript-wasm-build
 channels:
+  - https://repo.prefix.dev/emscripten-forge-dev
   - conda-forge
 dependencies:
+  - cmake
+  - pkg-config
+  - emscripten_emscripten-wasm32==3.1.73
   - anywidget
   - cmake
-  - emsdk >=3.1.46
-  - empack >=3.2.0
   - jupyter_server  # to enable contents
   - jupyterlite-core
   - jupyterlite-xeus
diff --git a/environment-wasm-host.yml b/environment-wasm-host.yml
index 77b52e5..6e0ca82 100644
--- a/environment-wasm-host.yml
+++ b/environment-wasm-host.yml
@@ -1,8 +1,8 @@
 name: xeus-javascript-wasm-host
 channels:
-  - https://repo.mamba.pm/emscripten-forge
+  - https://repo.prefix.dev/emscripten-forge-dev
   - https://repo.mamba.pm/conda-forge
 dependencies:
   - nlohmann_json
-  - xeus-lite >=3.0.0,<4.0
-  - xeus >=5.0.0,<6.0
+  - xeus-lite >= 4.0.0
+  - xeus >= 2.4.0
diff --git a/src/post.js b/src/post.js
index 9fa6b9f..4c024a9 100644
--- a/src/post.js
+++ b/src/post.js
@@ -685,8 +685,12 @@ Module._complete_request = _complete_request;
 Module.FS = FS;
 Module.ijs = ijs;
 
+if (!('wasmTable' in Module)) {
+    Module['wasmTable'] = wasmTable
+}
 
-// function get_comm_manager(){
-//     return Module._com_manager;
-// }
-// Module.get_comm_manager = get_comm_manager;
+Module['FS'] = FS
+Module['PATH'] = PATH
+Module['LDSO'] = LDSO
+Module['getDylinkMetadata'] = getDylinkMetadata
+Module['loadDynamicLibrary'] = loadDynamicLibrary