diff --git a/package.json b/package.json
index d84e899b1..5fd516da7 100644
--- a/package.json
+++ b/package.json
@@ -131,7 +131,7 @@
     "codeceptjs": "^2.6.11",
     "eslint": "^4.19.1",
     "eslint-plugin-mocha": "^4.12.1",
-    "flat": "^4.0.0",
+    "flat": "^5.0.0",
     "grunt": ">=1.5.3",
     "grunt-cli": "1.3.2",
     "grunt-concurrent": "3.0.0",
diff --git a/yarn.lock b/yarn.lock
index 5bd059934..109c279f7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5075,7 +5075,7 @@ __metadata:
     express-session: 1.17.1
     extract-text-webpack-plugin: ^4.0.0-beta.0
     file-loader: ^6.2.0
-    flat: ^4.0.0
+    flat: ^5.0.0
     formidable: ^1.1.1
     fstream: ^1.0.12
     glob: ^7.1.1
@@ -6624,7 +6624,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"flat@npm:^4.0.0, flat@npm:^4.1.0":
+"flat@npm:^4.1.0":
   version: 4.1.1
   resolution: "flat@npm:4.1.1"
   dependencies:
@@ -6635,7 +6635,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"flat@npm:^5.0.2":
+"flat@npm:^5.0.0, flat@npm:^5.0.2":
   version: 5.0.2
   resolution: "flat@npm:5.0.2"
   bin: