diff --git a/package.json b/package.json
index f682baf235..5775d600ae 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "karma-coverage-istanbul-reporter": "3.0.3",
     "karma-jasmine": "5.1.0",
     "karma-junit-reporter": "2.0.1",
-    "karma-sourcemap-loader": "0.3.8",
+    "karma-sourcemap-loader": "0.4.0",
     "karma-spec-reporter": "0.0.36",
     "karma-webpack": "5.0.0",
     "kdbush": "3.0.0",