diff --git a/package.json b/package.json
index 11e14dc..bc4143b 100644
--- a/package.json
+++ b/package.json
@@ -99,6 +99,7 @@
     ],
     "env": {
       "debug": {
+        "sourceMaps": "both",
         "presets": [
           [
             "@babel/preset-env",
@@ -110,6 +111,7 @@
         ]
       },
       "test": {
+        "sourceMaps": "both",
         "presets": [
           [
             "@babel/preset-env",