diff --git a/environment-wasm-build.yml b/environment-wasm-build.yml
index 12afc8d8..6bbb0a29 100644
--- a/environment-wasm-build.yml
+++ b/environment-wasm-build.yml
@@ -1,6 +1,6 @@
 name: xeus-cpp-wasm-build
 channels:
-  - https://repo.prefix.dev/emscripten-forge-dev
+  - https://repo.mamba.pm/emscripten-forge
   - conda-forge
 dependencies:
   - cmake
diff --git a/environment-wasm-host.yml b/environment-wasm-host.yml
index da8170f5..2cfd3737 100644
--- a/environment-wasm-host.yml
+++ b/environment-wasm-host.yml
@@ -1,8 +1,9 @@
 name: xeus-cpp-wasm-host
 channels:
-  - https://repo.prefix.dev/emscripten-forge-dev
+  - https://repo.mamba.pm/emscripten-forge
   - https://repo.mamba.pm/conda-forge
 dependencies:
+  - emscripten-abi==3.1.73
   - nlohmann_json
   - xeus-lite
   - xeus