diff --git a/bili.config.base.ts b/bili.config.base.ts
index 128d1d1..6177ea3 100644
--- a/bili.config.base.ts
+++ b/bili.config.base.ts
@@ -3,9 +3,14 @@ import type { Config } from "bili";
 const config: Config = {
   plugins: {
     typescript2: {
+      useTsconfigDeclarationDir: true,
       tsconfigOverride: {
         include: ["src"],
-        exclude: ["**/*.test.ts"]
+        exclude: ["**/*.test.ts"],
+        compilerOptions: {
+          declaration: true,
+          declarationDir: "./dist/types"
+        }
       }
     }
   },
diff --git a/bili.config.community.ts b/bili.config.community.ts
index ab0846e..b0a7f92 100644
--- a/bili.config.community.ts
+++ b/bili.config.community.ts
@@ -3,9 +3,14 @@ import type { Config } from "bili";
 const config: Config = {
   plugins: {
     typescript2: {
+      useTsconfigDeclarationDir: true,
       tsconfigOverride: {
         include: ["src"],
-        exclude: ["**/*.test.ts"]
+        exclude: ["**/*.test.ts"],
+        compilerOptions: {
+          declaration: true,
+          declarationDir: "./dist/types"
+        }
       }
     }
   },
diff --git a/package.json b/package.json
index e7ee032..ba91218 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
   "module": "dist/ad-notations.esm.js",
   "unpkg": "dist/ad-notations.umd.js",
   "jsdelivr": "dist/ad-notations.umd.js",
+  "types": "dist/types/index.d.ts",
   "keywords": [
     "notations",
     "numbers"