diff --git a/examples/book-mode-conference/package-lock.json b/examples/book-mode-conference/package-lock.json
index 62815fe..ed4c946 100644
--- a/examples/book-mode-conference/package-lock.json
+++ b/examples/book-mode-conference/package-lock.json
@@ -10,7 +10,7 @@
       "dependencies": {
         "@hackmd/api": "file:../../nodejs",
         "dotenv": "^16.4.5",
-        "lodash": "^4.17.21",
+        "lodash": "^4.17.23",
         "moment": "^2.29.4"
       },
       "devDependencies": {
@@ -577,9 +577,9 @@
       }
     },
     "node_modules/lodash": {
-      "version": "4.17.21",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
-      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+      "version": "4.17.23",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz",
+      "integrity": "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w==",
       "license": "MIT"
     },
     "node_modules/moment": {
diff --git a/examples/book-mode-conference/package.json b/examples/book-mode-conference/package.json
index 6debafc..1da5d43 100644
--- a/examples/book-mode-conference/package.json
+++ b/examples/book-mode-conference/package.json
@@ -11,7 +11,7 @@
   "dependencies": {
     "@hackmd/api": "file:../../nodejs",
     "dotenv": "^16.4.5",
-    "lodash": "^4.17.21",
+    "lodash": "^4.17.23",
     "moment": "^2.29.4"
   },
   "devDependencies": {