diff --git a/libraries/botbuilder-storage-azure-table/package-lock.json b/libraries/botbuilder-storage-azure-table/package-lock.json
index ca151bc5..e21f2df5 100644
--- a/libraries/botbuilder-storage-azure-table/package-lock.json
+++ b/libraries/botbuilder-storage-azure-table/package-lock.json
@@ -300,6 +300,14 @@
             "xml2js": "0.2.8",
             "xmlbuilder": "^9.0.7"
           }
+        },
+        "flat": {
+          "version": "4.1.1",
+          "resolved": "https://registry.npmjs.org/flat/-/flat-4.1.1.tgz",
+          "integrity": "sha512-FmTtBsHskrU6FJ2VxCnsDb84wu9zhmO3cUX2kGFb5tuwhfXxGciiT0oRY+cck35QmG+NmGh5eLz6lLCpWTqwpA==",
+          "requires": {
+            "is-buffer": "~2.0.3"
+          }
         }
       }
     },
@@ -518,12 +526,9 @@
       }
     },
     "flat": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/flat/-/flat-4.1.0.tgz",
-      "integrity": "sha512-Px/TiLIznH7gEDlPXcUD4KnBusa6kR6ayRUVcnEAbreRIuhkqow/mun59BuRXwoYk7ZQOLW1ZM05ilIvK38hFw==",
-      "requires": {
-        "is-buffer": "~2.0.3"
-      }
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/flat/-/flat-5.0.1.tgz",
+      "integrity": "sha512-DUYDWLlMhV9qvhjbgmhDQ3ZycXmoOKzrj4KN0+5BEat5SqTlXcXzxNgwiSN1UQHA5Z0BsgYYPelhQHVhpfqaVA=="
     },
     "follow-redirects": {
       "version": "1.5.10",
diff --git a/libraries/botbuilder-storage-azure-table/package.json b/libraries/botbuilder-storage-azure-table/package.json
index f6d0eca1..01460764 100644
--- a/libraries/botbuilder-storage-azure-table/package.json
+++ b/libraries/botbuilder-storage-azure-table/package.json
@@ -34,7 +34,7 @@
     "botbuilder": "^4.8.0",
     "botbuilder-azure": "^4.8.0",
     "botbuilder-core": "^4.8.0",
-    "flat": "^4.1.0"
+    "flat": "^5.0.1"
   },
   "devDependencies": {
     "@types/node": "^7.10.6",
diff --git a/libraries/botbuilder-storage-mongodb/package-lock.json b/libraries/botbuilder-storage-mongodb/package-lock.json
index 16cb4d99..1c3e3fa6 100644
--- a/libraries/botbuilder-storage-mongodb/package-lock.json
+++ b/libraries/botbuilder-storage-mongodb/package-lock.json
@@ -350,12 +350,9 @@
       }
     },
     "flat": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/flat/-/flat-4.1.0.tgz",
-      "integrity": "sha512-Px/TiLIznH7gEDlPXcUD4KnBusa6kR6ayRUVcnEAbreRIuhkqow/mun59BuRXwoYk7ZQOLW1ZM05ilIvK38hFw==",
-      "requires": {
-        "is-buffer": "~2.0.3"
-      }
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/flat/-/flat-5.0.1.tgz",
+      "integrity": "sha512-DUYDWLlMhV9qvhjbgmhDQ3ZycXmoOKzrj4KN0+5BEat5SqTlXcXzxNgwiSN1UQHA5Z0BsgYYPelhQHVhpfqaVA=="
     },
     "follow-redirects": {
       "version": "1.5.10",
diff --git a/libraries/botbuilder-storage-mongodb/package.json b/libraries/botbuilder-storage-mongodb/package.json
index 5ab283c9..46cad40f 100644
--- a/libraries/botbuilder-storage-mongodb/package.json
+++ b/libraries/botbuilder-storage-mongodb/package.json
@@ -29,7 +29,7 @@
   "dependencies": {
     "botbuilder": "^4.8.0",
     "botbuilder-core": "^4.8.0",
-    "flat": "^4.1.0",
+    "flat": "^5.0.1",
     "mongodb": "^3.3.2"
   },
   "devDependencies": {