diff --git a/package-lock.json b/package-lock.json
index 8ca8b1d..bcd5030 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
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         "@govtechsg/document-store": "^2.2.3",
-        "@govtechsg/open-attestation": "^6.2.0",
+        "@govtechsg/open-attestation": "^6.9.0",
         "@govtechsg/token-registry": "^4.1.7",
         "axios": "^1.6.2",
         "debug": "^4.3.1",
@@ -1609,9 +1609,9 @@
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-      "resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.4.1.tgz",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/abi/-/abi-5.7.0.tgz",
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@@ -1623,21 +1623,21 @@
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-        "@ethersproject/logger": "^5.4.0",
-        "@ethersproject/properties": "^5.4.0",
-        "@ethersproject/strings": "^5.4.0"
+        "@ethersproject/address": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/constants": "^5.7.0",
+        "@ethersproject/hash": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
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-      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-provider/-/abstract-provider-5.4.1.tgz",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-provider/-/abstract-provider-5.7.0.tgz",
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@@ -1649,19 +1649,19 @@
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-        "@ethersproject/properties": "^5.4.0",
-        "@ethersproject/transactions": "^5.4.0",
-        "@ethersproject/web": "^5.4.0"
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/networks": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
+        "@ethersproject/transactions": "^5.7.0",
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-      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-signer/-/abstract-signer-5.4.1.tgz",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/abstract-signer/-/abstract-signer-5.7.0.tgz",
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@@ -1673,17 +1673,17 @@
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-        "@ethersproject/bytes": "^5.4.0",
-        "@ethersproject/logger": "^5.4.0",
-        "@ethersproject/properties": "^5.4.0"
+        "@ethersproject/abstract-provider": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
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-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/address/-/address-5.4.0.tgz",
-      "integrity": "sha512-SD0VgOEkcACEG/C6xavlU1Hy3m5DGSXW3CUHkaaEHbAPPsgi0coP5oNPsxau8eTlZOk/bpa/hKeCNoK5IzVI2Q==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/address/-/address-5.7.0.tgz",
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@@ -1695,17 +1695,17 @@
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-        "@ethersproject/keccak256": "^5.4.0",
-        "@ethersproject/logger": "^5.4.0",
-        "@ethersproject/rlp": "^5.4.0"
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/rlp": "^5.7.0"
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     "node_modules/@ethersproject/base64": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/base64/-/base64-5.4.0.tgz",
-      "integrity": "sha512-CjQw6E17QDSSC5jiM9YpF7N1aSCHmYGMt9bWD8PWv6YPMxjsys2/Q8xLrROKI3IWJ7sFfZ8B3flKDTM5wlWuZQ==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/base64/-/base64-5.7.0.tgz",
+      "integrity": "sha512-Dr8tcHt2mEbsZr/mwTPIQAf3Ai0Bks/7gTw9dSqk1mQvhW3XvRlmDJr/4n+wg1JmCl16NZue17CDh8xb/vZ0sQ==",
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@@ -1717,13 +1717,13 @@
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-        "@ethersproject/bytes": "^5.4.0"
+        "@ethersproject/bytes": "^5.7.0"
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     "node_modules/@ethersproject/basex": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/basex/-/basex-5.4.0.tgz",
-      "integrity": "sha512-J07+QCVJ7np2bcpxydFVf/CuYo9mZ7T73Pe7KQY4c1lRlrixMeblauMxHXD0MPwFmUHZIILDNViVkykFBZylbg==",
+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/basex/-/basex-5.7.0.tgz",
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@@ -1735,14 +1735,14 @@
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-        "@ethersproject/bytes": "^5.4.0",
-        "@ethersproject/properties": "^5.4.0"
+        "@ethersproject/bytes": "^5.7.0",
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     "node_modules/@ethersproject/bignumber": {
-      "version": "5.4.2",
-      "resolved": "https://registry.npmjs.org/@ethersproject/bignumber/-/bignumber-5.4.2.tgz",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/bignumber/-/bignumber-5.7.0.tgz",
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@@ -1754,15 +1754,20 @@
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-        "@ethersproject/logger": "^5.4.0",
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+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "bn.js": "^5.2.1"
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+    "node_modules/@ethersproject/bignumber/node_modules/bn.js": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
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+    },
     "node_modules/@ethersproject/bytes": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/bytes/-/bytes-5.4.0.tgz",
-      "integrity": "sha512-H60ceqgTHbhzOj4uRc/83SCN9d+BSUnOkrr2intevqdtEMO1JFVZ1XL84OEZV+QjV36OaZYxtnt4lGmxcGsPfA==",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/bytes/-/bytes-5.7.0.tgz",
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@@ -1774,13 +1779,13 @@
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-        "@ethersproject/logger": "^5.4.0"
+        "@ethersproject/logger": "^5.7.0"
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     "node_modules/@ethersproject/constants": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/@ethersproject/constants/-/constants-5.4.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/constants/-/constants-5.7.0.tgz",
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@@ -1792,13 +1797,13 @@
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-        "@ethersproject/bignumber": "^5.4.0"
+        "@ethersproject/bignumber": "^5.7.0"
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     "node_modules/@ethersproject/contracts": {
-      "version": "5.4.1",
-      "resolved": "https://registry.npmjs.org/@ethersproject/contracts/-/contracts-5.4.1.tgz",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/contracts/-/contracts-5.7.0.tgz",
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@@ -1810,22 +1815,22 @@
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-        "@ethersproject/properties": "^5.4.0",
-        "@ethersproject/transactions": "^5.4.0"
+        "@ethersproject/abi": "^5.7.0",
+        "@ethersproject/abstract-provider": "^5.7.0",
+        "@ethersproject/abstract-signer": "^5.7.0",
+        "@ethersproject/address": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/constants": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
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     "node_modules/@ethersproject/hash": {
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-      "resolved": "https://registry.npmjs.org/@ethersproject/hash/-/hash-5.4.0.tgz",
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+      "version": "5.7.0",
+      "resolved": "https://registry.npmjs.org/@ethersproject/hash/-/hash-5.7.0.tgz",
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@@ -1837,20 +1842,21 @@
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-        "@ethersproject/properties": "^5.4.0",
-        "@ethersproject/strings": "^5.4.0"
+        "@ethersproject/abstract-signer": "^5.7.0",
+        "@ethersproject/address": "^5.7.0",
+        "@ethersproject/base64": "^5.7.0",
+        "@ethersproject/bignumber": "^5.7.0",
+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
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-      "resolved": "https://registry.npmjs.org/@ethersproject/hdnode/-/hdnode-5.4.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/hdnode/-/hdnode-5.7.0.tgz",
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@@ -1862,24 +1868,24 @@
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-        "@ethersproject/transactions": "^5.4.0",
-        "@ethersproject/wordlists": "^5.4.0"
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+      "resolved": "https://registry.npmjs.org/@ethersproject/json-wallets/-/json-wallets-5.7.0.tgz",
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@@ -1891,25 +1897,25 @@
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+        "@ethersproject/bytes": "^5.7.0",
+        "@ethersproject/hdnode": "^5.7.0",
+        "@ethersproject/keccak256": "^5.7.0",
+        "@ethersproject/logger": "^5.7.0",
+        "@ethersproject/pbkdf2": "^5.7.0",
+        "@ethersproject/properties": "^5.7.0",
+        "@ethersproject/random": "^5.7.0",
+        "@ethersproject/strings": "^5.7.0",
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+      "resolved": "https://registry.npmjs.org/@ethersproject/keccak256/-/keccak256-5.7.0.tgz",
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@@ -1921,19 +1927,14 @@
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@@ -2274,11 +2282,11 @@
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+        "@ethersproject/properties": "^5.7.0",
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     "node_modules/@govtechsg/dnsprove": {
@@ -2325,46 +2333,24 @@
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-      "resolved": "https://registry.npmjs.org/@govtechsg/open-attestation/-/open-attestation-6.2.0.tgz",
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+      "version": "6.9.0",
+      "resolved": "https://registry.npmjs.org/@govtechsg/open-attestation/-/open-attestation-6.9.0.tgz",
+      "integrity": "sha512-213TWxhmboOK6FV6eBy955NX9jrPPNJXrVicTr2a4xNaQioFHjcbEY4wBq+3LjAb0xcleUCYXUFlqkXUaMYpBg==",
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       "dependencies": {
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-        "ajv": "^8.6.2",
-        "ajv-formats": "^2.1.0",
-        "cross-fetch": "^3.1.4",
+        "cross-fetch": "^3.1.5",
         "debug": "^4.3.2",
-        "ethers": "^5.4.3",
+        "ethers": "^5.7.2",
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         "js-base64": "^3.6.1",
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         "lodash": "^4.17.21",
         "runtypes": "^6.3.2",
         "uuid": "^8.3.2",
-        "validator": "^13.6.0"
+        "validator": "^13.7.0"
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-    "node_modules/@govtechsg/open-attestation/node_modules/ajv": {
-      "version": "8.6.3",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.6.3.tgz",
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-      "funding": {
-        "type": "github",
-        "url": "https://github.com/sponsors/epoberezkin"
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       "resolved": "https://registry.npmjs.org/uuid/-/uuid-8.3.2.tgz",
@@ -5268,42 +5254,6 @@
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       }
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-    "node_modules/ajv-formats": {
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-      "resolved": "https://registry.npmjs.org/ajv-formats/-/ajv-formats-2.1.1.tgz",
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-      "peerDependencies": {
-        "ajv": "^8.0.0"
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-      "peerDependenciesMeta": {
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-    "node_modules/ajv-formats/node_modules/ajv": {
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-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.6.3.tgz",
-      "integrity": "sha512-SMJOdDP6LqTkD0Uq8qLi+gMwSt0imXLSV080qFVwJCpH9U6Mb+SUGHAXM0KNbcBPguytWyvFxcHgMLe2D2XSpw==",
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-        "require-from-string": "^2.0.2",
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-        "url": "https://github.com/sponsors/epoberezkin"
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-    "node_modules/ajv-formats/node_modules/json-schema-traverse": {
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-      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
-      "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug=="
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       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
@@ -8532,9 +8482,9 @@
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-      "resolved": "https://registry.npmjs.org/ethers/-/ethers-5.4.7.tgz",
-      "integrity": "sha512-iZc5p2nqfWK1sj8RabwsPM28cr37Bpq7ehTQ5rWExBr2Y09Sn1lDKZOED26n+TsZMye7Y6mIgQ/1cwpSD8XZew==",
+      "version": "5.7.2",
+      "resolved": "https://registry.npmjs.org/ethers/-/ethers-5.7.2.tgz",
+      "integrity": "sha512-wswUsmWo1aOK8rR7DIKiWSw9DbLWe6x98Jrn8wcTflTVvaXhAMaB5zGAXy0GYQEQp9iO1iSHWVyARQm11zUtyg==",
       "funding": [
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@@ -8546,36 +8496,36 @@
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-        "@ethersproject/abstract-provider": "5.4.1",
-        "@ethersproject/abstract-signer": "5.4.1",
-        "@ethersproject/address": "5.4.0",
-        "@ethersproject/base64": "5.4.0",
-        "@ethersproject/basex": "5.4.0",
-        "@ethersproject/bignumber": "5.4.2",
-        "@ethersproject/bytes": "5.4.0",
-        "@ethersproject/constants": "5.4.0",
-        "@ethersproject/contracts": "5.4.1",
-        "@ethersproject/hash": "5.4.0",
-        "@ethersproject/hdnode": "5.4.0",
-        "@ethersproject/json-wallets": "5.4.0",
-        "@ethersproject/keccak256": "5.4.0",
-        "@ethersproject/logger": "5.4.1",
-        "@ethersproject/networks": "5.4.2",
-        "@ethersproject/pbkdf2": "5.4.0",
-        "@ethersproject/properties": "5.4.1",
-        "@ethersproject/providers": "5.4.5",
-        "@ethersproject/random": "5.4.0",
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-        "@ethersproject/sha2": "5.4.0",
-        "@ethersproject/signing-key": "5.4.0",
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-        "@ethersproject/transactions": "5.4.0",
-        "@ethersproject/units": "5.4.0",
-        "@ethersproject/wallet": "5.4.0",
-        "@ethersproject/web": "5.4.0",
-        "@ethersproject/wordlists": "5.4.0"
+        "@ethersproject/abi": "5.7.0",
+        "@ethersproject/abstract-provider": "5.7.0",
+        "@ethersproject/abstract-signer": "5.7.0",
+        "@ethersproject/address": "5.7.0",
+        "@ethersproject/base64": "5.7.0",
+        "@ethersproject/basex": "5.7.0",
+        "@ethersproject/bignumber": "5.7.0",
+        "@ethersproject/bytes": "5.7.0",
+        "@ethersproject/constants": "5.7.0",
+        "@ethersproject/contracts": "5.7.0",
+        "@ethersproject/hash": "5.7.0",
+        "@ethersproject/hdnode": "5.7.0",
+        "@ethersproject/json-wallets": "5.7.0",
+        "@ethersproject/keccak256": "5.7.0",
+        "@ethersproject/logger": "5.7.0",
+        "@ethersproject/networks": "5.7.1",
+        "@ethersproject/pbkdf2": "5.7.0",
+        "@ethersproject/properties": "5.7.0",
+        "@ethersproject/providers": "5.7.2",
+        "@ethersproject/random": "5.7.0",
+        "@ethersproject/rlp": "5.7.0",
+        "@ethersproject/sha2": "5.7.0",
+        "@ethersproject/signing-key": "5.7.0",
+        "@ethersproject/solidity": "5.7.0",
+        "@ethersproject/strings": "5.7.0",
+        "@ethersproject/transactions": "5.7.0",
+        "@ethersproject/units": "5.7.0",
+        "@ethersproject/wallet": "5.7.0",
+        "@ethersproject/web": "5.7.1",
+        "@ethersproject/wordlists": "5.7.0"
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     "node_modules/ethr-did-registry": {
@@ -8956,7 +8906,8 @@
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       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
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+      "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==",
+      "dev": true
     },
     "node_modules/fast-diff": {
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@@ -19787,6 +19738,7 @@
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+      "dev": true,
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       }
@@ -20047,6 +19999,7 @@
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+      "dev": true,
       "engines": {
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       }
@@ -22473,6 +22426,7 @@
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+      "dev": true,
       "dependencies": {
         "punycode": "^2.1.0"
       }
diff --git a/package.json b/package.json
index 7d39ce6..f226d7d 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   "dependencies": {
     "@govtechsg/dnsprove": "^2.6.2",
     "@govtechsg/document-store": "^2.2.3",
-    "@govtechsg/open-attestation": "^6.2.0",
+    "@govtechsg/open-attestation": "^6.9.0",
     "@govtechsg/token-registry": "^4.1.7",
     "axios": "^1.6.2",
     "debug": "^4.3.1",