diff --git a/pyodide-cross-build-environments.json b/pyodide-cross-build-environments.json
index f60588ccd..d69c3d543 100644
--- a/pyodide-cross-build-environments.json
+++ b/pyodide-cross-build-environments.json
@@ -8,6 +8,14 @@
       "emscripten_version": "3.1.58",
       "min_pyodide_build_version": "0.26.0"
     },
+    "0.26.3": {
+      "version": "0.26.3",
+      "url": "https://github.com/pyodide/pyodide/releases/download/0.26.3/xbuildenv-0.26.3.tar.bz2",
+      "sha256": "538b00bb7b329f96e6f981464bc7875109b9779f8d121e2140235c375f530675",
+      "python_version": "3.12.1",
+      "emscripten_version": "3.1.58",
+      "min_pyodide_build_version": "0.26.0"
+    },
     "0.26.2": {
       "version": "0.26.2",
       "url": "https://github.com/pyodide/pyodide/releases/download/0.26.2/xbuildenv-0.26.2.tar.bz2",