diff --git a/04-retry-failed-requests-with-rxjs-and-the-httpclient-in-angular/package-lock.json b/04-retry-failed-requests-with-rxjs-and-the-httpclient-in-angular/package-lock.json
old mode 100755
new mode 100644
index ab11eda..3b53ac2
--- a/04-retry-failed-requests-with-rxjs-and-the-httpclient-in-angular/package-lock.json
+++ b/04-retry-failed-requests-with-rxjs-and-the-httpclient-in-angular/package-lock.json
@@ -1490,9 +1490,9 @@
       "dev": true
     },
     "decode-uri-component": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
-      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.2.tgz",
+      "integrity": "sha512-FqUYQ+8o158GyGTrMFJms9qh3CqTKvAqgqsTnkLI8sKu0028orqBhxNMFkFen0zGyg6epACD32pjVk58ngIErQ==",
       "dev": true
     },
     "default-require-extensions": {
@@ -5044,6 +5044,11 @@
         "tslib": "^1.9.0"
       }
     },
+    "rxjs-compat": {
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/rxjs-compat/-/rxjs-compat-6.4.0.tgz",
+      "integrity": "sha512-eo/O8RS83hJdJukCtA+IF6qnqa8FPOuVo+OPCzgVi+dbTle9KCdNv97IcQO0WwNVik7DJLKmf0F8uwzc0q40vw=="
+    },
     "safe-buffer": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",