diff --git a/blockchain/predeploy-contracts/package.json b/blockchain/predeploy-contracts/package.json
index bcd12990..3118e566 100644
--- a/blockchain/predeploy-contracts/package.json
+++ b/blockchain/predeploy-contracts/package.json
@@ -13,7 +13,7 @@
     "truffle-compile": "truffle compile"
   },
   "dependencies": {
-    "@openzeppelin/contracts": "4.9.3",
+    "@openzeppelin/contracts": "4.9.6",
     "ethers": "^5.0.32",
     "handlebars": "^4.7.7"
   },
diff --git a/blockchain/predeploy-contracts/yarn.lock b/blockchain/predeploy-contracts/yarn.lock
index 6aec9f06..f307d802 100644
--- a/blockchain/predeploy-contracts/yarn.lock
+++ b/blockchain/predeploy-contracts/yarn.lock
@@ -577,10 +577,10 @@
   resolved "https://registry.yarnpkg.com/@nodefactory/filsnap-types/-/filsnap-types-0.2.2.tgz#f95cbf93ce5815d8d151c60663940086b015cb8f"
   integrity sha512-XT1tE2vrYF2D0tSNNekgjqKRpqPQn4W72eKul9dDCul/8ykouhqnVTyjFHYvBhlBWE0PK3nmG7i83QvhgGSiMw==
 
-"@openzeppelin/contracts@4.9.3":
-  version "4.9.3"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.9.3.tgz#00d7a8cf35a475b160b3f0293a6403c511099364"
-  integrity sha512-He3LieZ1pP2TNt5JbkPA4PNT9WC3gOTOlDcFGJW4Le4QKqwmiNJCRt44APfxMxvq7OugU/cqYuPcSBzOw38DAg==
+"@openzeppelin/contracts@4.9.6":
+  version "4.9.6"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.9.6.tgz#2a880a24eb19b4f8b25adc2a5095f2aa27f39677"
+  integrity sha512-xSmezSupL+y9VkHZJGDoCBpmnB2ogM13ccaYDWqJTfS3dbuHkgjuwDFUmaFauBCboQMGB/S5UqUl2y54X99BmA==
 
 "@protobufjs/aspromise@^1.1.1", "@protobufjs/aspromise@^1.1.2":
   version "1.1.2"
@@ -3432,30 +3432,31 @@ es-to-primitive@^1.2.1:
     is-date-object "^1.0.1"
     is-symbol "^1.0.2"
 
-es5-ext@^0.10.35, es5-ext@^0.10.50:
-  version "0.10.53"
-  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.53.tgz#93c5a3acfdbef275220ad72644ad02ee18368de1"
-  integrity sha512-Xs2Stw6NiNHWypzRTY1MtaG/uJlwCk8kH81920ma8mvN8Xq1gsfhZvpkImLQArw8AHnv8MT2I45J3c0R8slE+Q==
+es5-ext@^0.10.35, es5-ext@^0.10.50, es5-ext@^0.10.62, es5-ext@~0.10.14:
+  version "0.10.64"
+  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.64.tgz#12e4ffb48f1ba2ea777f1fcdd1918ef73ea21714"
+  integrity sha512-p2snDhiLaXe6dahss1LddxqEm+SkuDvV8dnIQG0MWjyHpcMNfXKPE+/Cc0y+PhxJX3A4xGNeFCj5oc0BUh6deg==
   dependencies:
-    es6-iterator "~2.0.3"
-    es6-symbol "~3.1.3"
-    next-tick "~1.0.0"
+    es6-iterator "^2.0.3"
+    es6-symbol "^3.1.3"
+    esniff "^2.0.1"
+    next-tick "^1.1.0"
 
 es6-denodeify@^0.1.1:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/es6-denodeify/-/es6-denodeify-0.1.5.tgz#31d4d5fe9c5503e125460439310e16a2a3f39c1f"
   integrity sha1-MdTV/pxVA+ElRgQ5MQ4WoqPznB8=
 
-es6-iterator@~2.0.3:
+es6-iterator@^2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/es6-iterator/-/es6-iterator-2.0.3.tgz#a7de889141a05a94b0854403b2d0a0fbfa98f3b7"
-  integrity sha1-p96IkUGgWpSwhUQDstCg+/qY87c=
+  integrity sha512-zw4SRzoUkd+cl+ZoE15A9o1oQd920Bb0iOJMQkQhl3jNc03YqVjAhG7scf9C5KWRU/R13Orf588uCC6525o02g==
   dependencies:
     d "1"
     es5-ext "^0.10.35"
     es6-symbol "^3.1.1"
 
-es6-symbol@^3.1.1, es6-symbol@~3.1.3:
+es6-symbol@^3.1.1, es6-symbol@^3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.1.3.tgz#bad5d3c1bcdac28269f4cb331e431c78ac705d18"
   integrity sha512-NJ6Yn3FuDinBaBRWl/q5X/s4koRHBrgKAu+yGI6JCBeiu3qrcbJhwT2GeR/EXVfylRk8dpQVJoLEFhK+Mu31NA==
@@ -3507,6 +3508,16 @@ esdoc@^1.0.4:
     minimist "1.2.0"
     taffydb "2.7.3"
 
+esniff@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/esniff/-/esniff-2.0.1.tgz#a4d4b43a5c71c7ec51c51098c1d8a29081f9b308"
+  integrity sha512-kTUIGKQ/mDPFoJ0oVfcmyJn4iBDRptjNVIzwIFR7tqWXdVI9xfA2RMwY/gbSpJG3lkdWNEjLap/NqVHZiJsdfg==
+  dependencies:
+    d "^1.0.1"
+    es5-ext "^0.10.62"
+    event-emitter "^0.3.5"
+    type "^2.7.2"
+
 esprima@^4.0.0, esprima@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
@@ -3654,6 +3665,14 @@ ethjs-unit@0.1.6:
     bn.js "4.11.6"
     number-to-bn "1.7.0"
 
+event-emitter@^0.3.5:
+  version "0.3.5"
+  resolved "https://registry.yarnpkg.com/event-emitter/-/event-emitter-0.3.5.tgz#df8c69eef1647923c7157b9ce83840610b02cc39"
+  integrity sha512-D9rRn9y7kLPnJ+hMq7S/nhvoKwwvVJahBi2BPmx3bvbsEdK3W9ii8cBSGjP+72/LnM4n6fo3+dkCX5FeTQruXA==
+  dependencies:
+    d "1"
+    es5-ext "~0.10.14"
+
 event-iterator@^1.0.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/event-iterator/-/event-iterator-1.2.0.tgz#2e71dc6ca56f1cf8ebcb2b9be7fdfd10acabbb76"
@@ -6392,10 +6411,10 @@ neo-async@^2.6.0:
   resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.2.tgz#b4aafb93e3aeb2d8174ca53cf163ab7d7308305f"
   integrity sha512-Yd3UES5mWCSqR+qNT93S3UoYUkqAZ9lLg8a7g9rimsWmYGK8cVToA4/sF3RrshdyV3sAGMXVUmpMYOw+dLpOuw==
 
-next-tick@~1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.0.0.tgz#ca86d1fe8828169b0120208e3dc8424b9db8342c"
-  integrity sha1-yobR/ogoFpsBICCOPchCS524NCw=
+next-tick@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.1.0.tgz#1836ee30ad56d67ef281b22bd199f709449b35eb"
+  integrity sha512-CXdUiJembsNjuToQvxayPZF9Vqht7hewsvy2sOWafLvi2awflj9mOC6bHIg50orX8IJvWKY9wYQ/zB2kogPslQ==
 
 no-case@^2.2.0, no-case@^2.3.2:
   version "2.3.2"
@@ -8704,6 +8723,11 @@ type@^2.5.0:
   resolved "https://registry.yarnpkg.com/type/-/type-2.6.0.tgz#3ca6099af5981d36ca86b78442973694278a219f"
   integrity sha512-eiDBDOmkih5pMbo9OqsqPRGMljLodLcwd5XD5JbtNB0o89xZAwynY9EdCDsJU7LtcVCClu9DvM7/0Ep1hYX3EQ==
 
+type@^2.7.2:
+  version "2.7.2"
+  resolved "https://registry.yarnpkg.com/type/-/type-2.7.2.tgz#2376a15a3a28b1efa0f5350dcf72d24df6ef98d0"
+  integrity sha512-dzlvlNlt6AXU7EBSfpAscydQ7gXB+pPGsPnfJnZpiNJBDj7IaJzQlBZYGdEi4R9HmPdBv2XmWJ6YUtoTa7lmCw==
+
 typedarray-to-buffer@^3.1.5, typedarray-to-buffer@~3.1.5:
   version "3.1.5"
   resolved "https://registry.yarnpkg.com/typedarray-to-buffer/-/typedarray-to-buffer-3.1.5.tgz#a97ee7a9ff42691b9f783ff1bc5112fe3fca9080"