diff --git a/package-lock.json b/package-lock.json
index 45ebe4e..7b5502b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
             "version": "0.0.1",
             "license": "MIT",
             "dependencies": {
-                "@openzeppelin/contracts": "^3.2.0",
+                "@openzeppelin/contracts": "^4.8.3",
                 "base64url": "^3.0.1",
                 "circom": "^0.5.38",
                 "circomlib": "^0.5.1",
@@ -1495,9 +1495,9 @@
             }
         },
         "node_modules/@openzeppelin/contracts": {
-            "version": "3.4.1",
-            "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.4.1.tgz",
-            "integrity": "sha512-cUriqMauq1ylzP2TxePNdPqkwI7Le3Annh4K9rrpvKfSBB/bdW+Iu1ihBaTIABTAAJ85LmKL5SSPPL9ry8d1gQ=="
+            "version": "4.8.3",
+            "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.3.tgz",
+            "integrity": "sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg=="
         },
         "node_modules/@resolver-engine/core": {
             "version": "0.3.3",
@@ -4034,7 +4034,7 @@
         },
         "node_modules/ethereumjs-abi": {
             "version": "0.6.8",
-            "resolved": "https://git@github.com/ethereumjs/ethereumjs-abi.git#ee3994657fa7a427238e6ba92a84d0b529bbcde0",
+            "resolved": "git+https://git@github.com/ethereumjs/ethereumjs-abi.git#ee3994657fa7a427238e6ba92a84d0b529bbcde0",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -18810,7 +18810,7 @@
             }
         },
         "node_modules/snarkjs/node_modules/blake2b-wasm": {
-            "resolved": "https://git@github.com/jbaylina/blake2b-wasm.git#0d5f024b212429c7f50a7f533aa3a2406b5b42b3",
+            "resolved": "git+https://git@github.com/jbaylina/blake2b-wasm.git#0d5f024b212429c7f50a7f533aa3a2406b5b42b3",
             "dependencies": {
                 "nanoassert": "^1.0.0"
             }
@@ -21788,9 +21788,9 @@
             }
         },
         "@openzeppelin/contracts": {
-            "version": "3.4.1",
-            "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-3.4.1.tgz",
-            "integrity": "sha512-cUriqMauq1ylzP2TxePNdPqkwI7Le3Annh4K9rrpvKfSBB/bdW+Iu1ihBaTIABTAAJ85LmKL5SSPPL9ry8d1gQ=="
+            "version": "4.8.3",
+            "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.8.3.tgz",
+            "integrity": "sha512-bQHV8R9Me8IaJoJ2vPG4rXcL7seB7YVuskr4f+f5RyOStSZetwzkWtoqDMl5erkBJy0lDRUnIR2WIkPiC0GJlg=="
         },
         "@resolver-engine/core": {
             "version": "0.3.3",
@@ -24013,7 +24013,7 @@
             }
         },
         "ethereumjs-abi": {
-            "version": "https://git@github.com/ethereumjs/ethereumjs-abi.git#ee3994657fa7a427238e6ba92a84d0b529bbcde0",
+            "version": "git+https://git@github.com/ethereumjs/ethereumjs-abi.git#ee3994657fa7a427238e6ba92a84d0b529bbcde0",
             "dev": true,
             "from": "ethereumjs-abi@0.6.8",
             "requires": {
@@ -35640,7 +35640,7 @@
             },
             "dependencies": {
                 "blake2b-wasm": {
-                    "version": "https://git@github.com/jbaylina/blake2b-wasm.git#0d5f024b212429c7f50a7f533aa3a2406b5b42b3",
+                    "version": "git+https://git@github.com/jbaylina/blake2b-wasm.git#0d5f024b212429c7f50a7f533aa3a2406b5b42b3",
                     "from": "blake2b-wasm@git+https://github.com/jbaylina/blake2b-wasm.git",
                     "requires": {
                         "nanoassert": "^1.0.0"
diff --git a/package.json b/package.json
index 50f01d3..139ac53 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
         "ts-node": "^9.0.0"
     },
     "dependencies": {
-        "@openzeppelin/contracts": "^3.2.0",
+        "@openzeppelin/contracts": "^4.8.3",
         "base64url": "^3.0.1",
         "circom": "^0.5.38",
         "circomlib": "^0.5.1",