diff --git a/build_mkdocs.sh b/build_mkdocs.sh
index 1ec94cd..7396f91 100755
--- a/build_mkdocs.sh
+++ b/build_mkdocs.sh
@@ -29,7 +29,7 @@ if [ ! -d "$WASM_ENV_PREFIX" ]; then
             --yes \
             python pybind11 nlohmann_json pybind11_json numpy \
             bzip2 sqlite zlib libffi exceptiongroup \
-            xeus xeus-lite xeus-python "xeus-javascript>=0.3.2" xtl "ipython=8.22.2=py311had7285e_1" "traitlets>=5.14.2"
+            "xeus<4" "xeus-lite<2" xeus-python "xeus-javascript>=0.3.2" xtl "ipython=8.22.2=py311had7285e_1" "traitlets>=5.14.2"
 
 else
     echo "Wasm env $WASM_ENV_NAME already exists"