diff --git a/.gitignore b/.gitignore
index 4c18567..869f9de 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@
 
 # Generated types
 *.d.ts
+*.d.ts.map
 
 # Library specific ones
 index.mjs
diff --git a/declaration.tsconfig.json b/declaration.tsconfig.json
index f6fe2d3..1b62630 100644
--- a/declaration.tsconfig.json
+++ b/declaration.tsconfig.json
@@ -6,6 +6,7 @@
   ],
   "compilerOptions": {
     "declaration": true,
+    "declarationMap": true,
     "noEmit": false,
     "emitDeclarationOnly": true
   }
diff --git a/package.json b/package.json
index d90fd8a..b7a08f2 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,8 @@
   "files": [
     "index.js",
     "index.mjs",
-    "index.d.ts"
+    "index.d.ts",
+    "index.d.ts.map"
   ],
   "scripts": {
     "build:0": "run-s clean",
@@ -109,4 +110,4 @@
     "type-coverage": "^2.14.6",
     "typescript": "^4.1.3"
   }
-}
+}
\ No newline at end of file