diff --git a/test/projects/buidler/package-lock.json b/test/projects/buidler/package-lock.json
index bd403e5..9184809 100644
--- a/test/projects/buidler/package-lock.json
+++ b/test/projects/buidler/package-lock.json
@@ -470,9 +470,9 @@
       }
     },
     "@openzeppelin/contracts": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.0.1.tgz",
-      "integrity": "sha512-uSrD7hZ0ViuHGqHZbeHawZBi/uy7aBiNramXAt2dFFuSuoU4u9insS3V3zdVfOnYSPreUo636xSOuQIFN4//HA=="
+      "version": "4.7.3",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.7.3.tgz",
+      "integrity": "sha512-dGRS0agJzu8ybo44pCIf3xBaPQN/65AIXNgK8+4gzKd5kbvlqyxryUYVLJv7fK98Seyd2hDZzVEHSWAh0Bt1Yw=="
     },
     "@sindresorhus/is": {
       "version": "0.7.0",
diff --git a/test/projects/buidler/package.json b/test/projects/buidler/package.json
index 550e30c..a043075 100644
--- a/test/projects/buidler/package.json
+++ b/test/projects/buidler/package.json
@@ -19,6 +19,6 @@
     "ethers": "^4.0.47"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "^3.0.1"
+    "@openzeppelin/contracts": "^4.7.3"
   }
 }