diff --git a/impl/package-lock.json b/impl/package-lock.json
index 907de39..d89939e 100644
--- a/impl/package-lock.json
+++ b/impl/package-lock.json
@@ -593,9 +593,9 @@
       }
     },
     "truffle": {
-      "version": "5.0.26",
-      "resolved": "https://registry.npmjs.org/truffle/-/truffle-5.0.26.tgz",
-      "integrity": "sha512-gf3Khot59ZM2Tegqb2md0lpr1SXGUHKJkSajCyXsiFCiiHUbX6NpXn/mgJgk1SXt7FAHpL0zYdLI1pYfqzvBFw==",
+      "version": "5.0.28",
+      "resolved": "https://registry.npmjs.org/truffle/-/truffle-5.0.28.tgz",
+      "integrity": "sha512-ccpvgrHW7EGfJ4cowMgh5dCAILG5Ie8q2QNBhnGtHxyPTDxb8o2/sgVIi5BZhaueijOPb47sYe2ojKlY6dk8+Q==",
       "dev": true,
       "requires": {
         "app-module-path": "^2.2.0",
diff --git a/impl/package.json b/impl/package.json
index 0b7f269..0bcc6eb 100644
--- a/impl/package.json
+++ b/impl/package.json
@@ -25,7 +25,7 @@
   "homepage": "https://github.com/xinbenlv/eip-2135#readme",
   "devDependencies": {
     "ganache-cli": "6.4.5",
-    "truffle": "5.0.26"
+    "truffle": "5.0.28"
   },
   "dependencies": {
     "openzeppelin-solidity": "^2.3.0",