diff --git a/.gitignore b/.gitignore
index b976b9c..388388c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 *.d.ts
 *.log
+*.map
 *.tsbuildinfo
 .DS_Store
 coverage/
diff --git a/package.json b/package.json
index 7ef2530..0ea7fed 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
   "exports": "./index.js",
   "files": [
     "lib/",
+    "index.d.ts.map",
     "index.d.ts",
     "index.js"
   ],
diff --git a/tsconfig.json b/tsconfig.json
index 82cc749..fc3d1e4 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,6 +2,7 @@
   "compilerOptions": {
     "checkJs": true,
     "customConditions": ["development"],
+    "declarationMap": true,
     "declaration": true,
     "emitDeclarationOnly": true,
     "exactOptionalPropertyTypes": true,