diff --git a/packages/service-worker/BUILD.bazel b/packages/service-worker/BUILD.bazel
index 5777b67bf0..338a09267c 100644
--- a/packages/service-worker/BUILD.bazel
+++ b/packages/service-worker/BUILD.bazel
@@ -30,7 +30,9 @@ genrule(
     name = "ngsw_worker_renamed",
     srcs = ["//packages/service-worker/worker:ngsw_worker.es6.js"],
     outs = ["ngsw-worker.js"],
-    cmd = "cp $< $@",
+    # Remove sourcemap since this file will be served in production site
+    # See https://github.com/angular/angular/issues/23596
+    cmd = "grep -v '//# sourceMappingURL' < $< > $@",
 )
 
 ng_package(