diff --git a/.github/workflows/deploy-github-page.yml b/.github/workflows/deploy-github-page.yml
index d7753af8..e437df27 100644
--- a/.github/workflows/deploy-github-page.yml
+++ b/.github/workflows/deploy-github-page.yml
@@ -22,7 +22,6 @@ jobs:
         include:
           - name: Github-page
             os: ubuntu-24.04
-            emsdk_ver: "3.1.45"
     steps:
       - uses: actions/checkout@v4
         with:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6b349d74..e9563165 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -198,23 +198,22 @@ jobs:
         include:
           - name: ubu24
             os: ubuntu-24.04-arm
-            emsdk_ver: "3.1.45"
             micromamba_shell_init: bash
           - name: osx15-arm
             os: macos-15
-            emsdk_ver: "3.1.45"
             micromamba_shell_init: bash
-
+           
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-
+            
       - name: install mamba
         uses: mamba-org/setup-micromamba@main
         with:
-          init-shell: >-
-            ${{ matrix.micromamba_shell_init }}
+          environment-file: environment-wasm-build.yml
+          init-shell: ${{ matrix.micromamba_shell_init }}
+          environment-name: xeus-cpp-wasm-build
 
       - name: Setup default Build Type on *nux
         if: ${{ runner.os != 'windows' }}
@@ -232,14 +231,6 @@ jobs:
           $env:ncpus=$([Environment]::ProcessorCount) 
           echo "ncpus=$env:ncpus" >> $env:GITHUB_ENV
 
-      - name: Setup emsdk
-        shell: bash -l {0}
-        run: |
-          cd $HOME
-          git clone --depth=1 https://github.com/emscripten-core/emsdk.git
-          cd emsdk
-          ./emsdk install  ${{ matrix.emsdk_ver }}
-
       - name: Build xeus-cpp
         shell: bash -l {0}
         run: |
@@ -250,9 +241,10 @@ jobs:
           mkdir build
           pushd build
 
+          export BUILD_PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-build
           export PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-host 
           echo "PREFIX=$PREFIX" >> $GITHUB_ENV
-          export SYSROOT_PATH=$HOME/emsdk/upstream/emscripten/cache/sysroot
+          export SYSROOT_PATH=$BUILD_PREFIX/opt/emsdk/upstream/emscripten/cache/sysroot
 
           emcmake cmake \
             -DCMAKE_BUILD_TYPE=Release                        \
diff --git a/docs/source/InstallationAndUsage.rst b/docs/source/InstallationAndUsage.rst
index 0ece4b01..3e10ad2d 100644
--- a/docs/source/InstallationAndUsage.rst
+++ b/docs/source/InstallationAndUsage.rst
@@ -52,13 +52,11 @@ These instructions will assume you have cmake installed on your system. First cl
     git clone --depth=1 https://github.com/compiler-research/xeus-cpp.git
     cd ./xeus-cpp
 
-
 You'll now want to make sure you are using the same emsdk as the rest of our dependencies. This can be achieved by executing 
 the following
 
 .. code-block:: bash
 
-
     micromamba create -f environment-wasm-build.yml -y
     micromamba activate xeus-cpp-wasm-build
 
diff --git a/environment-wasm-build.yml b/environment-wasm-build.yml
index a074ec55..12afc8d8 100644
--- a/environment-wasm-build.yml
+++ b/environment-wasm-build.yml
@@ -1,7 +1,7 @@
 name: xeus-cpp-wasm-build
 channels:
-  - https://repo.mamba.pm/emscripten-forge
+  - https://repo.prefix.dev/emscripten-forge-dev
   - conda-forge
 dependencies:
   - cmake
-  - emscripten_emscripten-wasm32==3.1.45
\ No newline at end of file
+  - emscripten_emscripten-wasm32==3.1.73
\ No newline at end of file
diff --git a/environment-wasm-host.yml b/environment-wasm-host.yml
index a7ea2462..ea6fe04e 100644
--- a/environment-wasm-host.yml
+++ b/environment-wasm-host.yml
@@ -1,9 +1,9 @@
 name: xeus-cpp-wasm-host
 channels:
-  - https://repo.mamba.pm/emscripten-forge
+  - https://repo.prefix.dev/emscripten-forge-dev
   - https://repo.mamba.pm/conda-forge
 dependencies:
-  - emscripten-abi==3.1.45
+  - emscripten-abi==3.1.73
   - nlohmann_json
   - xeus-lite
   - xeus