diff --git a/.placeholder/13-WASM_Modules/README.md b/.placeholder/13-WASM_Modules/README.md
new file mode 100644
index 0000000..e3bf950
--- /dev/null
+++ b/.placeholder/13-WASM_Modules/README.md
@@ -0,0 +1,3 @@
+https://github.com/istio-ecosystem/wasm-extensions
+
+https://github.com/istio-ecosystem/wasm-extensions/tree/master/extensions/basic_auth
\ No newline at end of file