diff --git a/contracts/lib/openzeppelin-contracts/package-lock.json b/contracts/lib/openzeppelin-contracts/package-lock.json
index 51a7185..4c7c65f 100644
--- a/contracts/lib/openzeppelin-contracts/package-lock.json
+++ b/contracts/lib/openzeppelin-contracts/package-lock.json
@@ -36,7 +36,7 @@
         "keccak256": "^1.0.2",
         "lodash.startcase": "^4.4.0",
         "lodash.zip": "^4.2.0",
-        "merkletreejs": "^0.2.13",
+        "merkletreejs": "^0.3.11",
         "micromatch": "^4.0.2",
         "prettier": "^2.8.1",
         "prettier-plugin-solidity": "^1.1.0",
@@ -4854,9 +4854,9 @@
       }
     },
     "node_modules/crypto-js": {
-      "version": "3.3.0",
-      "resolved": "https://registry.npmjs.org/crypto-js/-/crypto-js-3.3.0.tgz",
-      "integrity": "sha512-DIT51nX0dCfKltpRiXV+/TVZq+Qq2NgF4644+K7Ttnla7zEzqc+kjJyiB96BHNyUTBxyjzRcZYpUdZa+QAqi6Q==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/crypto-js/-/crypto-js-4.2.0.tgz",
+      "integrity": "sha512-KALDyEYgpY+Rlob/iriUtjV6d5Eq+Y191A5g4UqLAi8CyGP9N1+FdVbkc1SxKc2r4YAYqG8JzO2KGL+AizD70Q==",
       "dev": true
     },
     "node_modules/css-select": {
@@ -9904,14 +9904,14 @@
       }
     },
     "node_modules/merkletreejs": {
-      "version": "0.2.32",
-      "resolved": "https://registry.npmjs.org/merkletreejs/-/merkletreejs-0.2.32.tgz",
-      "integrity": "sha512-TostQBiwYRIwSE5++jGmacu3ODcKAgqb0Y/pnIohXS7sWxh1gCkSptbmF1a43faehRDpcHf7J/kv0Ml2D/zblQ==",
+      "version": "0.3.11",
+      "resolved": "https://registry.npmjs.org/merkletreejs/-/merkletreejs-0.3.11.tgz",
+      "integrity": "sha512-LJKTl4iVNTndhL+3Uz/tfkjD0klIWsHlUzgtuNnNrsf7bAlXR30m+xYB7lHr5Z/l6e/yAIsr26Dabx6Buo4VGQ==",
       "dev": true,
       "dependencies": {
         "bignumber.js": "^9.0.1",
         "buffer-reverse": "^1.0.1",
-        "crypto-js": "^3.1.9-1",
+        "crypto-js": "^4.2.0",
         "treeify": "^1.1.0",
         "web3-utils": "^1.3.4"
       },
@@ -17293,8 +17293,7 @@
           "version": "7.4.6",
           "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
           "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==",
-          "dev": true,
-          "requires": {}
+          "dev": true
         }
       }
     },
@@ -18650,8 +18649,7 @@
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.3.2.tgz",
       "integrity": "sha512-rq9s+JNhf0IChjtDXxllJ7g41oZk5SlXtp0LHwyA5cejwn7vKmKp4pPri6YEePv2PU65sAsegbXtIinmDFDXgQ==",
-      "dev": true,
-      "requires": {}
+      "dev": true
     },
     "address": {
       "version": "1.2.2",
@@ -19459,8 +19457,7 @@
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/chai-bn/-/chai-bn-0.2.2.tgz",
       "integrity": "sha512-MzjelH0p8vWn65QKmEq/DLBG1Hle4WeyqT79ANhXZhn/UxRWO0OogkAxi5oGGtfzwU9bZR8mvbvYdoqNVWQwFg==",
-      "dev": true,
-      "requires": {}
+      "dev": true
     },
     "chalk": {
       "version": "3.0.0",
@@ -20015,9 +20012,9 @@
       }
     },
     "crypto-js": {
-      "version": "3.3.0",
-      "resolved": "https://registry.npmjs.org/crypto-js/-/crypto-js-3.3.0.tgz",
-      "integrity": "sha512-DIT51nX0dCfKltpRiXV+/TVZq+Qq2NgF4644+K7Ttnla7zEzqc+kjJyiB96BHNyUTBxyjzRcZYpUdZa+QAqi6Q==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/crypto-js/-/crypto-js-4.2.0.tgz",
+      "integrity": "sha512-KALDyEYgpY+Rlob/iriUtjV6d5Eq+Y191A5g4UqLAi8CyGP9N1+FdVbkc1SxKc2r4YAYqG8JzO2KGL+AizD70Q==",
       "dev": true
     },
     "css-select": {
@@ -20772,8 +20769,7 @@
       "version": "8.6.0",
       "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-8.6.0.tgz",
       "integrity": "sha512-bAF0eLpLVqP5oEVUFKpMA+NnRFICwn9X8B5jrR9FcqnYBuPbqWEjTEspPWMj5ye6czoSLDweCzSo3Ko7gGrZaA==",
-      "dev": true,
-      "requires": {}
+      "dev": true
     },
     "eslint-scope": {
       "version": "7.1.1",
@@ -23975,14 +23971,14 @@
       "dev": true
     },
     "merkletreejs": {
-      "version": "0.2.32",
-      "resolved": "https://registry.npmjs.org/merkletreejs/-/merkletreejs-0.2.32.tgz",
-      "integrity": "sha512-TostQBiwYRIwSE5++jGmacu3ODcKAgqb0Y/pnIohXS7sWxh1gCkSptbmF1a43faehRDpcHf7J/kv0Ml2D/zblQ==",
+      "version": "0.3.11",
+      "resolved": "https://registry.npmjs.org/merkletreejs/-/merkletreejs-0.3.11.tgz",
+      "integrity": "sha512-LJKTl4iVNTndhL+3Uz/tfkjD0klIWsHlUzgtuNnNrsf7bAlXR30m+xYB7lHr5Z/l6e/yAIsr26Dabx6Buo4VGQ==",
       "dev": true,
       "requires": {
         "bignumber.js": "^9.0.1",
         "buffer-reverse": "^1.0.1",
-        "crypto-js": "^3.1.9-1",
+        "crypto-js": "^4.2.0",
         "treeify": "^1.1.0",
         "web3-utils": "^1.3.4"
       },
@@ -28762,8 +28758,7 @@
       "version": "7.5.9",
       "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.9.tgz",
       "integrity": "sha512-F+P9Jil7UiSKSkppIiD94dN07AwvFixvLIj1Og1Rl9GGMuNipJnV9JzjD6XuqmAeiswGvUmNLjr5cFuXwNS77Q==",
-      "dev": true,
-      "requires": {}
+      "dev": true
     },
     "xhr": {
       "version": "2.6.0",
diff --git a/contracts/lib/openzeppelin-contracts/package.json b/contracts/lib/openzeppelin-contracts/package.json
index b4035b8..17c32b3 100644
--- a/contracts/lib/openzeppelin-contracts/package.json
+++ b/contracts/lib/openzeppelin-contracts/package.json
@@ -77,7 +77,7 @@
     "keccak256": "^1.0.2",
     "lodash.startcase": "^4.4.0",
     "lodash.zip": "^4.2.0",
-    "merkletreejs": "^0.2.13",
+    "merkletreejs": "^0.3.11",
     "micromatch": "^4.0.2",
     "prettier": "^2.8.1",
     "prettier-plugin-solidity": "^1.1.0",