diff --git a/.npmignore b/.npmignore
index 13dc7b44..7ff2ec0e 100644
--- a/.npmignore
+++ b/.npmignore
@@ -36,6 +36,7 @@
 !typings/*.d.ts
 
 # Blacklist - (normal behavior) these will override any whitelist
+*.d.ts.map
 *.test.ts
 *.test.d.ts
 *.test.js
diff --git a/src/tsconfig-library-base.json b/src/tsconfig-library-base.json
index 66b61f09..7a9eedf3 100644
--- a/src/tsconfig-library-base.json
+++ b/src/tsconfig-library-base.json
@@ -2,6 +2,7 @@
   "extends": "./tsconfig-base.json",
   "compilerOptions": {
     "composite": true,
-    "strict": true
+    "strict": true,
+    "declarationMap": true
   }
 }