diff --git a/packages/share-theme/src/types.d.ts b/packages/share-theme/src/types.d.ts
new file mode 100644
index 000000000..3fa19bd49
--- /dev/null
+++ b/packages/share-theme/src/types.d.ts
@@ -0,0 +1,5 @@
+declare module "katex/contrib/auto-render" {
+    export default function renderMathInElement(elem: HTMLElement, options?: {})
+}
+
+declare module "katex/contrib/mhchem" {}