diff --git a/ch6_TodoList/package-lock.json b/ch6_TodoList/package-lock.json
index 108ade4..02d8de9 100644
--- a/ch6_TodoList/package-lock.json
+++ b/ch6_TodoList/package-lock.json
@@ -5947,7 +5947,6 @@
             "brace-expansion": {
               "version": "1.1.11",
               "bundled": true,
-              "optional": true,
               "requires": {
                 "balanced-match": "^1.0.0",
                 "concat-map": "0.0.1"
@@ -6095,14 +6094,6 @@
               "bundled": true,
               "optional": true
             },
-            "minimatch": {
-              "version": "3.0.4",
-              "bundled": true,
-              "optional": true,
-              "requires": {
-                "brace-expansion": "^1.1.7"
-              }
-            },
             "minimist": {
               "version": "1.2.5",
               "bundled": true,
@@ -6917,7 +6908,6 @@
             "brace-expansion": {
               "version": "1.1.11",
               "bundled": true,
-              "optional": true,
               "requires": {
                 "balanced-match": "^1.0.0",
                 "concat-map": "0.0.1"
@@ -7065,14 +7055,6 @@
               "bundled": true,
               "optional": true
             },
-            "minimatch": {
-              "version": "3.0.4",
-              "bundled": true,
-              "optional": true,
-              "requires": {
-                "brace-expansion": "^1.1.7"
-              }
-            },
             "minimist": {
               "version": "1.2.5",
               "bundled": true,
@@ -7701,9 +7683,9 @@
       "integrity": "sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg=="
     },
     "minimatch": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
-      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
+      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
       "requires": {
         "brace-expansion": "^1.1.7"
       }
diff --git a/ch6_TodoList/yarn.lock b/ch6_TodoList/yarn.lock
index 2f4207a..54a9cc5 100644
--- a/ch6_TodoList/yarn.lock
+++ b/ch6_TodoList/yarn.lock
@@ -1862,9 +1862,9 @@ babel-preset-jest@^25.3.0:
     babel-preset-current-node-syntax "^0.1.2"
 
 balanced-match@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
-  integrity sha1-ibTRmasr7kneFk6gK4nORi1xt2c=
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.2.tgz#e83e3a7e3f300b34cb9d87f615fa0cbf357690ee"
+  integrity sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==
 
 base64-js@^1.1.2, base64-js@^1.2.3:
   version "1.3.1"
@@ -2253,7 +2253,7 @@ compression@^1.7.1:
 concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
-  integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
+  integrity sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==
 
 concat-stream@^1.6.0:
   version "1.6.2"
@@ -4996,9 +4996,9 @@ mimic-fn@^2.0.0, mimic-fn@^2.1.0:
   integrity sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==
 
 minimatch@^3.0.4:
-  version "3.0.4"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
-  integrity sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.1.2.tgz#19cd194bfd3e428f049a70817c038d89ab4be35b"
+  integrity sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==
   dependencies:
     brace-expansion "^1.1.7"