diff --git a/blockchain/package.json b/blockchain/package.json
index 84f12437..e8c2a528 100644
--- a/blockchain/package.json
+++ b/blockchain/package.json
@@ -29,7 +29,7 @@
   "author": "Tribalyte Technologies",
   "license": "SEE LICENSE IN LICENSE.md",
   "dependencies": {
-    "@openzeppelin/contracts": "3.3.0",
+    "@openzeppelin/contracts": "3.4.2",
     "@openzeppelin/test-helpers": "0.5.9",
     "@openzeppelin/upgrades": "2.8.0",
     "@truffle/contract": "4.3.2",
diff --git a/blockchain/yarn.lock b/blockchain/yarn.lock
index 6d3c85d9..8c055b2a 100644
--- a/blockchain/yarn.lock
+++ b/blockchain/yarn.lock
@@ -237,10 +237,10 @@
     find-up "^4.1.0"
     fs-extra "^8.1.0"
 
-"@openzeppelin/contracts@3.3.0":
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-3.3.0.tgz#ffdb693c5c349fc33bba420248dd3ac0a2d7c408"
-  integrity sha512-AemZEsQYtUp1WRkcmZm1div5ORfTpLquLaziCIrSagjxyKdmObxuaY1yjQ5SHFMctR8rLwp706NXTbiIRJg7pw==
+"@openzeppelin/contracts@3.4.2":
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-3.4.2.tgz#d81f786fda2871d1eb8a8c5a73e455753ba53527"
+  integrity sha512-z0zMCjyhhp4y7XKAcDAi3Vgms4T2PstwBdahiO0+9NaGICQKjynK3wduSRplTgk4LXmoO1yfDGO5RbjKYxtuxA==
 
 "@openzeppelin/test-helpers@0.5.9":
   version "0.5.9"