diff --git a/.github/workflows/emscripten.yaml b/.github/workflows/emscripten.yaml
index ebcf4583..9d903cae 100644
--- a/.github/workflows/emscripten.yaml
+++ b/.github/workflows/emscripten.yaml
@@ -29,7 +29,7 @@ jobs:
         python-version: "3.11"
 
     - name: Install pyodide-build
-      run: pip install pyodide-build==0.23.1
+      run: pip install pyodide-build==0.23.1 pydantic<2
 
     - name: Compute emsdk version
       id: compute-emsdk-version