diff --git a/.changeset/two-bikes-brush.md b/.changeset/two-bikes-brush.md
new file mode 100644
index 00000000..c99347f0
--- /dev/null
+++ b/.changeset/two-bikes-brush.md
@@ -0,0 +1,5 @@
+---
+"microbundle": patch
+---
+
+Add ambient typescript declaration for CSS Modules
diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 00000000..8b008475
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,4 @@
+declare module '*.module.css' {
+    const classes: { [key: string]: string };
+    export default classes;
+}