diff --git a/ReactReduxBook/package-lock.json b/ReactReduxBook/package-lock.json
index d966213..991edf8 100644
--- a/ReactReduxBook/package-lock.json
+++ b/ReactReduxBook/package-lock.json
@@ -1719,7 +1719,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -2134,7 +2135,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -2190,6 +2192,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -2233,12 +2236,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -2578,9 +2583,9 @@
       }
     },
     "lodash": {
-      "version": "3.10.1",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
-      "integrity": "sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y="
+      "version": "4.17.11",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
+      "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg=="
     },
     "lodash-es": {
       "version": "4.17.10",
diff --git a/ReactReduxBook/package.json b/ReactReduxBook/package.json
index f6c26e7..08ed906 100644
--- a/ReactReduxBook/package.json
+++ b/ReactReduxBook/package.json
@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "babel-preset-stage-1": "^6.1.18",
-    "lodash": "^3.10.1",
+    "lodash": "^4.17.11",
     "react": "16.3.2",
     "react-dom": "16.3.2",
     "react-redux": "5.0.7",