diff --git a/Projects/Pro-React-16-Book/todo/package-lock.json b/Projects/Pro-React-16-Book/todo/package-lock.json
index 6a28ac1..5e272c7 100644
--- a/Projects/Pro-React-16-Book/todo/package-lock.json
+++ b/Projects/Pro-React-16-Book/todo/package-lock.json
@@ -916,18 +916,24 @@
       "resolved": "https://registry.npmjs.org/@hapi/address/-/address-2.0.0.tgz",
       "integrity": "sha512-mV6T0IYqb0xL1UALPFplXYQmR0twnXG0M6jUswpquqT2sD12BOiCiLy3EvMp/Fy7s3DZElC4/aPjEjo2jeZpvw=="
     },
+    "@hapi/bourne": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/@hapi/bourne/-/bourne-1.3.2.tgz",
+      "integrity": "sha512-1dVNHT76Uu5N3eJNTYcvxee+jzX4Z9lfciqRRHCU27ihbUcYi+iSc2iml5Ke1LXe1SyJCLA0+14Jh4tXJgOppA=="
+    },
     "@hapi/hoek": {
-      "version": "6.2.4",
-      "resolved": "https://registry.npmjs.org/@hapi/hoek/-/hoek-6.2.4.tgz",
-      "integrity": "sha512-HOJ20Kc93DkDVvjwHyHawPwPkX44sIrbXazAUDiUXaY2R9JwQGo2PhFfnQtdrsIe4igjG2fPgMra7NYw7qhy0A=="
+      "version": "8.5.1",
+      "resolved": "https://registry.npmjs.org/@hapi/hoek/-/hoek-8.5.1.tgz",
+      "integrity": "sha512-yN7kbciD87WzLGc5539Tn0sApjyiGHAJgKvG9W8C7O+6c7qmoQMfVs0W4bX17eqz6C78QJqqFrtgdK5EWf6Qow=="
     },
     "@hapi/joi": {
-      "version": "15.0.3",
-      "resolved": "https://registry.npmjs.org/@hapi/joi/-/joi-15.0.3.tgz",
-      "integrity": "sha512-z6CesJ2YBwgVCi+ci8SI8zixoj8bGFn/vZb9MBPbSyoxsS2PnWYjHcyTM17VLK6tx64YVK38SDIh10hJypB+ig==",
+      "version": "15.1.1",
+      "resolved": "https://registry.npmjs.org/@hapi/joi/-/joi-15.1.1.tgz",
+      "integrity": "sha512-entf8ZMOK8sc+8YfeOlM8pCfg3b5+WZIKBfUaaJT8UsjAAPjartzxIYm3TIbjvA4u+u++KbcXD38k682nVHDAQ==",
       "requires": {
         "@hapi/address": "2.x.x",
-        "@hapi/hoek": "6.x.x",
+        "@hapi/bourne": "1.x.x",
+        "@hapi/hoek": "8.x.x",
         "@hapi/topo": "3.x.x"
       }
     },
@@ -937,6 +943,13 @@
       "integrity": "sha512-gZDI/eXOIk8kP2PkUKjWu9RW8GGVd2Hkgjxyr/S7Z+JF+0mr7bAlbw+DkTRxnD580o8Kqxlnba9wvqp5aOHBww==",
       "requires": {
         "@hapi/hoek": "6.x.x"
+      },
+      "dependencies": {
+        "@hapi/hoek": {
+          "version": "6.2.4",
+          "resolved": "https://registry.npmjs.org/@hapi/hoek/-/hoek-6.2.4.tgz",
+          "integrity": "sha512-HOJ20Kc93DkDVvjwHyHawPwPkX44sIrbXazAUDiUXaY2R9JwQGo2PhFfnQtdrsIe4igjG2fPgMra7NYw7qhy0A=="
+        }
       }
     },
     "@jest/console": {
@@ -9954,6 +9967,8 @@
     },
     "react": {
       "version": "16.8.6",
+      "resolved": "https://registry.npmjs.org/react/-/react-16.8.6.tgz",
+      "integrity": "sha512-pC0uMkhLaHm11ZSJULfOBqV4tIZkx87ZLvbbQYunNixAAvjnC+snJCg0XQXn9VIsttVsbZP/H/ewzgsd5fxKXw==",
       "requires": {
         "loose-envify": "^1.1.0",
         "object-assign": "^4.1.1",
@@ -10053,6 +10068,8 @@
     },
     "react-dom": {
       "version": "16.8.6",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-16.8.6.tgz",
+      "integrity": "sha512-1nL7PIq9LTL3fthPqwkvr2zY7phIPjYrT0jp4HjyEQrEROnw4dG41VVwi/wfoCneoleqrNX7iAD+pXebJZwrwA==",
       "requires": {
         "loose-envify": "^1.1.0",
         "object-assign": "^4.1.1",
@@ -10072,6 +10089,8 @@
     },
     "react-scripts": {
       "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/react-scripts/-/react-scripts-3.0.1.tgz",
+      "integrity": "sha512-LKEjBhVpEB+c312NeJhzF+NATxF7JkHNr5GhtwMeRS1cMeLElMeIu8Ye7WGHtDP7iz7ra4ryy48Zpo6G/cwWUw==",
       "requires": {
         "@babel/core": "7.4.3",
         "@svgr/webpack": "4.1.0",
diff --git a/Projects/Pro-React-16-Book/todo/yarn.lock b/Projects/Pro-React-16-Book/todo/yarn.lock
index 25b6936..9a2476c 100644
--- a/Projects/Pro-React-16-Book/todo/yarn.lock
+++ b/Projects/Pro-React-16-Book/todo/yarn.lock
@@ -2064,6 +2064,11 @@ boolbase@^1.0.0, boolbase@~1.0.0:
   resolved "https://registry.yarnpkg.com/boolbase/-/boolbase-1.0.0.tgz#68dff5fbe60c51eb37725ea9e3ed310dcc1e776e"
   integrity sha1-aN/1++YMUes3cl6p4+0xDcwed24=
 
+bootstrap@^4.3.1:
+  version "4.6.2"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-4.6.2.tgz#8e0cd61611728a5bf65a3a2b8d6ff6c77d5d7479"
+  integrity sha512-51Bbp/Uxr9aTuy6ca/8FbFloBUJZLHwnhTcnjIeRn2suQWsWzcuJhGjKDB5eppVte/8oCdOL3VuwxvZDUggwGQ==
+
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
@@ -7846,15 +7851,15 @@ react-dev-utils@^9.0.1:
     strip-ansi "5.2.0"
     text-table "0.2.0"
 
-react-dom@16.8.6:
-  version "16.8.6"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.6.tgz#71d6303f631e8b0097f56165ef608f051ff6e10f"
-  integrity sha512-1nL7PIq9LTL3fthPqwkvr2zY7phIPjYrT0jp4HjyEQrEROnw4dG41VVwi/wfoCneoleqrNX7iAD+pXebJZwrwA==
+react-dom@^16.8.6:
+  version "16.14.0"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.14.0.tgz#7ad838ec29a777fb3c75c3a190f661cf92ab8b89"
+  integrity sha512-1gCeQXDLoIqMgqD3IO2Ah9bnf0w9kzhwN5q4FGnHZ67hBm9yePzB5JJAIQCc8x3pFnNlwFq4RidZggNAAkzWWw==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.13.6"
+    scheduler "^0.19.1"
 
 react-error-overlay@^5.1.6:
   version "5.1.6"
@@ -7926,15 +7931,14 @@ react-scripts@3.0.1:
   optionalDependencies:
     fsevents "2.0.6"
 
-react@16.8.6:
-  version "16.8.6"
-  resolved "https://registry.yarnpkg.com/react/-/react-16.8.6.tgz#ad6c3a9614fd3a4e9ef51117f54d888da01f2bbe"
-  integrity sha512-pC0uMkhLaHm11ZSJULfOBqV4tIZkx87ZLvbbQYunNixAAvjnC+snJCg0XQXn9VIsttVsbZP/H/ewzgsd5fxKXw==
+react@^16.8.6:
+  version "16.14.0"
+  resolved "https://registry.yarnpkg.com/react/-/react-16.14.0.tgz#94d776ddd0aaa37da3eda8fc5b6b18a4c9a3114d"
+  integrity sha512-0X2CImDkJGApiAlcf0ODKIneSwBPhqJawOa5wCtKbu7ZECrmS26NvtSILynQ66cgkT/RJ4LidJOc3bUESwmU8g==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.13.6"
 
 read-pkg-up@^2.0.0:
   version "2.0.0"
@@ -8364,10 +8368,10 @@ saxes@^3.1.9:
   dependencies:
     xmlchars "^1.3.1"
 
-scheduler@^0.13.6:
-  version "0.13.6"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.13.6.tgz#466a4ec332467b31a91b9bf74e5347072e4cd889"
-  integrity sha512-IWnObHt413ucAYKsD9J1QShUKkbKLQQHdxRyw73sw4FN26iWr3DY/H34xGPe4nmL1DwXyWmSWmMrA9TfQbE/XQ==
+scheduler@^0.19.1:
+  version "0.19.1"
+  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.19.1.tgz#4f3e2ed2c1a7d65681f4c854fa8c5a1ccb40f196"
+  integrity sha512-n/zwRWRYSUj0/3g/otKDRPMh6qv2SYMWNq85IEa8iZyAv8od9zDYpGSnpBEjNgcMNq6Scbu5KfIPxNF72R/2EA==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"