diff --git a/bau-css/bau-css.d.ts b/bau-css/bau-css.d.ts
index ef23814c..512b725a 100644
--- a/bau-css/bau-css.d.ts
+++ b/bau-css/bau-css.d.ts
@@ -2,7 +2,18 @@ export default function BauCss(input?: {
   window?: Window;
   target?: HTMLElement;
 }): {
-  css: (any) => string;
-  keyframes: (any) => string;
-  createGlobalStyles: (any) => any;
+  css: (
+    tag: TemplateStringsArray,
+    ...tagArgs: TagArgs
+  ) => string;
+  keyframes: (
+    tag: TemplateStringsArray,
+    ...tagArgs: TagArgs
+  ) => string;
+  createGlobalStyles: (
+    tag: TemplateStringsArray,
+    ...tagArgs: TagArgs
+  ) => any;
 };
+
+type TagArgs = (string | number)[]