diff --git a/recommender-sys/rec-book-firebase/functions/package-lock.json b/recommender-sys/rec-book-firebase/functions/package-lock.json
index 529e7ed..f3da4e6 100644
--- a/recommender-sys/rec-book-firebase/functions/package-lock.json
+++ b/recommender-sys/rec-book-firebase/functions/package-lock.json
@@ -1549,9 +1549,9 @@
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     },
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-      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.7.6.tgz",
-      "integrity": "sha512-1f2BACcBfiwAfStCKZNrUCgqNZkGsAT7UM3kkYtXuLo0KnaVfjKOyf7PRzB6++aK9STyT1Pd2ZCPe3EGOXleXA==",
+      "version": "4.7.7",
+      "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-4.7.7.tgz",
+      "integrity": "sha512-aAcXm5OAfE/8IXkcZvCepKU3VzW1/39Fb5ZuqMtgI/hT8X2YgoMvBY5dLhq/cpOvw7Lk1nK/UF71aLG/ZnVYRA==",
       "requires": {
         "minimist": "^1.2.5",
         "neo-async": "^2.6.0",
@@ -2751,9 +2751,9 @@
       }
     },
     "uglify-js": {
-      "version": "3.10.0",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.10.0.tgz",
-      "integrity": "sha512-Esj5HG5WAyrLIdYU74Z3JdG2PxdIusvj6IWHMtlyESxc7kcDz7zYlYjpnSokn1UbpV0d/QX9fan7gkCNd/9BQA==",
+      "version": "3.13.5",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.13.5.tgz",
+      "integrity": "sha512-xtB8yEqIkn7zmOyS2zUNBsYCBRhDkvlNxMMY2smuJ/qA8NCHeQvKCF3i9Z4k8FJH4+PJvZRtMrPynfZ75+CSZw==",
       "optional": true
     },
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diff --git a/recommender-sys/rec-book-firebase/functions/package.json b/recommender-sys/rec-book-firebase/functions/package.json
index fcc4957..ca1eb8f 100644
--- a/recommender-sys/rec-book-firebase/functions/package.json
+++ b/recommender-sys/rec-book-firebase/functions/package.json
@@ -18,7 +18,7 @@
     "cookie-parser": "~1.4.4",
     "express": "~4.16.1",
     "express-handlebars": "^3.0.0",
-    "handlebars": "^4.7.6"
+    "handlebars": "^4.7.7"
   },
   "devDependencies": {
     "firebase-functions-test": "^0.2.0"