diff --git a/angular-fundamentals/02/demos/1-before/package-lock.json b/angular-fundamentals/02/demos/1-before/package-lock.json
index 324fc71..5435b83 100644
--- a/angular-fundamentals/02/demos/1-before/package-lock.json
+++ b/angular-fundamentals/02/demos/1-before/package-lock.json
@@ -203,9 +203,12 @@
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@@ -5376,7 +5453,8 @@
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-      "dev": true
+      "dev": true,
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@@ -5418,6 +5496,7 @@
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       "integrity": "sha1-MT5mvB5cwG5Di8G3SZwuXFastqI=",
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+      "optional": true,
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@@ -5429,7 +5508,8 @@
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           "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-          "dev": true
+          "dev": true,
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@@ -6209,13 +6289,15 @@
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           "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true
+          "dev": true,
+          "optional": true
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           "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -6229,6 +6311,7 @@
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           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
+          "optional": true,
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@@ -6262,6 +6345,7 @@
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           "integrity": "sha1-NPUEnOHs3ysGSa8+8k5F7TVBbZE=",
           "dev": true,
+          "optional": true,
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@@ -6307,6 +6391,7 @@
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           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "dev": true,
+          "optional": true,
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@@ -6315,7 +6400,8 @@
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-          "dev": true
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@@ -6389,6 +6475,7 @@
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+      "optional": true,
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@@ -6421,7 +6508,8 @@
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       "integrity": "sha1-Rqarfwrq2N6unsBWV4C31O/rnUM=",
-      "dev": true
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@@ -10551,6 +10639,7 @@
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       "integrity": "sha1-ZUEYTMkK7qbG57NeJlkIJEPGYZg=",
       "dev": true,
+      "optional": true,
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@@ -10816,6 +10905,7 @@
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       "integrity": "sha1-US322mKHFEMW3EwY/hzx2UBzm+M=",
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@@ -10831,7 +10921,8 @@
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-          "dev": true
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@@ -11023,7 +11114,8 @@
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       "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -11354,6 +11446,7 @@
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       "integrity": "sha1-C2GKVWW23qkL80JdBNVe3EdadWE=",
       "dev": true,
+      "optional": true,
       "requires": {
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       }
@@ -11402,6 +11495,11 @@
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     },
+    "tslib": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.4.0.tgz",
+      "integrity": "sha512-d6xOpEDfsi2CZVlPQzGeux8XMwLT9hssAsaPYExaQMuYskwb+x1x7J371tWlbBdWHroy99KnVB6qIkUbs5X3UQ=="
+    },
     "tty-browserify": {
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       "resolved": "https://registry.npmjs.org/tty-browserify/-/tty-browserify-0.0.0.tgz",
@@ -11876,6 +11974,7 @@
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       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
       "dev": true,
+      "optional": true,
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@@ -11886,7 +11985,8 @@
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-          "dev": true
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@@ -13018,6 +13118,7 @@
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       "dev": true,
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diff --git a/angular-fundamentals/02/demos/1-before/package.json b/angular-fundamentals/02/demos/1-before/package.json
index 3eaa414..ba3c7ba 100644
--- a/angular-fundamentals/02/demos/1-before/package.json
+++ b/angular-fundamentals/02/demos/1-before/package.json
@@ -18,7 +18,7 @@
   "dependencies": {
     "@angular/common": "2.2.0",
     "@angular/compiler": "2.2.0",
-    "@angular/core": "2.2.0",
+    "@angular/core": "11.0.5",
     "@angular/forms": "2.2.0",
     "@angular/http": "2.2.0",
     "@angular/platform-browser": "2.2.0",