diff --git a/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package-lock.json b/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package-lock.json
index 44eba08b..19a8ed51 100644
--- a/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package-lock.json
+++ b/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package-lock.json
@@ -36,7 +36,7 @@
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         "@types/node": "^12.11.1",
         "jasmine-core": "~3.7.0",
-        "karma": "~6.3.0",
+        "karma": "~6.3.16",
         "karma-chrome-launcher": "~3.1.0",
         "karma-coverage": "~2.0.3",
         "karma-jasmine": "~4.0.0",
@@ -244,6 +244,28 @@
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+    "node_modules/@angular-devkit/core/node_modules/ajv": {
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+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.2.0.tgz",
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+      "dev": true,
+      "dependencies": {
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+        "json-schema-traverse": "^1.0.0",
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+        "uri-js": "^4.2.2"
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+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/@angular-devkit/core/node_modules/json-schema-traverse": {
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+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
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+      "dev": true
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       "resolved": "https://registry.npmjs.org/@angular-devkit/schematics/-/schematics-12.0.5.tgz",
@@ -2665,6 +2687,12 @@
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+      "resolved": "https://registry.npmjs.org/@socket.io/component-emitter/-/component-emitter-3.1.0.tgz",
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@@ -2683,23 +2711,20 @@
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+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/@types/cookie/-/cookie-0.4.1.tgz",
+      "integrity": "sha512-XW/Aa8APYr6jSVVA1y/DEIZX0/GMKLEVekNG727R8cs56ahETkRAy/3DR7+fJyh7oUgGwNQaRfXCun0+KbWY7Q==",
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-      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.10.tgz",
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-      "dev": true
+      "version": "2.8.13",
+      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.13.tgz",
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+      "dev": true,
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+      }
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+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
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-        "json-schema-traverse": "^1.0.0",
-        "require-from-string": "^2.0.2",
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+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.12.0.tgz",
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+      "dev": true,
+      "dependencies": {
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+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2",
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+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
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+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
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@@ -3591,15 +3638,6 @@
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@@ -3662,6 +3700,16 @@
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+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
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+      "optional": true,
+      "dependencies": {
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@@ -4953,28 +4957,6 @@
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@@ -5762,51 +5744,51 @@
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@@ -6339,6 +6321,13 @@
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-        "json-schema-traverse": {
-          "version": "0.4.1",
-          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
-          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
-          "dev": true
-        },
         "p-limit": {
           "version": "3.1.0",
           "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
@@ -27481,9 +27259,9 @@
       "dev": true
     },
     "ua-parser-js": {
-      "version": "0.7.28",
-      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.28.tgz",
-      "integrity": "sha512-6Gurc1n//gjp9eQNXjD9O3M/sMwVtN5S8Lv9bvOYBfKfDNiIIhqiyi01vMBO45u4zkDE420w/e0se7Vs+sIg+g==",
+      "version": "0.7.32",
+      "resolved": "https://registry.npmjs.org/ua-parser-js/-/ua-parser-js-0.7.32.tgz",
+      "integrity": "sha512-f9BESNVhzlhEFf2CHMSj40NWOjYPl1YKYbrvIr/hFTDEmLq7SRbWvm7FcdcpCYT95zrOhC7gZSxjdnnTpBcwVw==",
       "dev": true
     },
     "unicode-canonical-property-names-ecmascript": {
@@ -27778,18 +27556,6 @@
         "webpack-sources": "^2.3.0"
       },
       "dependencies": {
-        "ajv": {
-          "version": "6.12.6",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
-          "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
-          "dev": true,
-          "requires": {
-            "fast-deep-equal": "^3.1.1",
-            "fast-json-stable-stringify": "^2.0.0",
-            "json-schema-traverse": "^0.4.1",
-            "uri-js": "^4.2.2"
-          }
-        },
         "enhanced-resolve": {
           "version": "5.8.2",
           "resolved": "https://registry.npmjs.org/enhanced-resolve/-/enhanced-resolve-5.8.2.tgz",
@@ -27800,12 +27566,6 @@
             "tapable": "^2.2.0"
           }
         },
-        "json-schema-traverse": {
-          "version": "0.4.1",
-          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
-          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
-          "dev": true
-        },
         "schema-utils": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-3.0.0.tgz",
@@ -27849,24 +27609,6 @@
         "schema-utils": "^3.0.0"
       },
       "dependencies": {
-        "ajv": {
-          "version": "6.12.6",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
-          "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
-          "dev": true,
-          "requires": {
-            "fast-deep-equal": "^3.1.1",
-            "fast-json-stable-stringify": "^2.0.0",
-            "json-schema-traverse": "^0.4.1",
-            "uri-js": "^4.2.2"
-          }
-        },
-        "json-schema-traverse": {
-          "version": "0.4.1",
-          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
-          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
-          "dev": true
-        },
         "schema-utils": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/schema-utils/-/schema-utils-3.0.0.tgz",
@@ -27921,18 +27663,6 @@
         "yargs": "^13.3.2"
       },
       "dependencies": {
-        "ajv": {
-          "version": "6.12.6",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
-          "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
-          "dev": true,
-          "requires": {
-            "fast-deep-equal": "^3.1.1",
-            "fast-json-stable-stringify": "^2.0.0",
-            "json-schema-traverse": "^0.4.1",
-            "uri-js": "^4.2.2"
-          }
-        },
         "ansi-regex": {
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
@@ -28099,12 +27829,6 @@
             }
           }
         },
-        "json-schema-traverse": {
-          "version": "0.4.1",
-          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
-          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
-          "dev": true
-        },
         "micromatch": {
           "version": "3.1.10",
           "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-3.1.10.tgz",
diff --git a/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package.json b/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package.json
index db8b6274..f9689b9a 100644
--- a/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package.json
+++ b/20.1-configurando-a-aplicacao-com-environment-do-angular-cli-ng12/package.json
@@ -38,7 +38,7 @@
     "@types/jasmine": "~3.6.0",
     "@types/node": "^12.11.1",
     "jasmine-core": "~3.7.0",
-    "karma": "~6.3.0",
+    "karma": "~6.3.16",
     "karma-chrome-launcher": "~3.1.0",
     "karma-coverage": "~2.0.3",
     "karma-jasmine": "~4.0.0",