diff --git a/.yarn/cache/@blockfrost-openapi-npm-0.1.60-64f77da01a-1f857bda8d.zip b/.yarn/cache/@blockfrost-openapi-npm-0.1.60-64f77da01a-1f857bda8d.zip
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diff --git a/.yarn/cache/yaml-npm-2.2.1-b7f7f5e84d-2e443fed32.zip b/.yarn/cache/yaml-npm-2.2.1-b7f7f5e84d-2e443fed32.zip
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diff --git a/.yarn/cache/yaml-npm-2.3.4-8bb6dc2c0d-f8207ce430.zip b/.yarn/cache/yaml-npm-2.3.4-8bb6dc2c0d-f8207ce430.zip
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diff --git a/CHANGELOG.MD b/CHANGELOG.MD
index 9d5d14e3..dad4de0e 100644
--- a/CHANGELOG.MD
+++ b/CHANGELOG.MD
@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - added the `gotOptions` property to the `BlockFrostAPI` class. This property can be passed during the initialization of the `BlockFrostAPI` object. For more details, refer to the [Got Options documentation](https://github.com/sindresorhus/got/blob/main/documentation/2-options.md).
-
+- `txsRequiredSigners` for retrieving required signers (extra transaction witnesses)
 
 ## [5.5.0] - 2023-12-20
 
diff --git a/package.json b/package.json
index e51985e6..b6e9ecba 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "coverage-ci": "vitest run --coverage"
   },
   "dependencies": {
-    "@blockfrost/openapi": "0.1.60",
+    "@blockfrost/openapi": "0.1.64",
     "@emurgo/cardano-serialization-lib-nodejs": "^11.5.0",
     "@emurgo/cip14-js": "3.0.1",
     "bottleneck": "^2.19.5",
diff --git a/src/BlockFrostAPI.ts b/src/BlockFrostAPI.ts
index 05327578..55cbd45d 100644
--- a/src/BlockFrostAPI.ts
+++ b/src/BlockFrostAPI.ts
@@ -123,6 +123,7 @@ import {
   txsMirs,
   txsMetadata,
   txsRedeemers,
+  txsRequiredSigners,
   txSubmit,
 } from './endpoints/api/txs';
 import {
@@ -329,6 +330,7 @@ class BlockFrostAPI {
   txsMirs = txsMirs;
   txsMetadata = txsMetadata;
   txsRedeemers = txsRedeemers;
+  txsRequiredSigners = txsRequiredSigners;
   txSubmit = txSubmit;
 
   network = network;
diff --git a/src/endpoints/api/txs/index.ts b/src/endpoints/api/txs/index.ts
index d307c87c..72ec8374 100644
--- a/src/endpoints/api/txs/index.ts
+++ b/src/endpoints/api/txs/index.ts
@@ -244,6 +244,28 @@ export async function txsRedeemers(
   }
 }
 
+/**
+ * Obtains extra transaction witnesses.
+ * @see {@link https://docs.blockfrost.io/#tag/Cardano-Transactions/paths/~1txs~1%7Bhash%7D~required_signers/get | API docs for Transaction redeemers}
+ *
+ * @param hash - Transaction hash
+ * @returns Extra transaction witnesses
+ *
+ */
+export async function txsRequiredSigners(
+  this: BlockFrostAPI,
+  hash: string,
+): Promise<components['schemas']['tx_content_required_signers']> {
+  try {
+    const res = await this.instance<
+      components['schemas']['tx_content_required_signers']
+    >(`txs/${hash}/required_signers`);
+    return res.body;
+  } catch (error) {
+    throw handleError(error);
+  }
+}
+
 /**
  * Submits a transaction to the network.
  * @see {@link https://docs.blockfrost.io/#tag/Cardano-Transactions/paths/~1tx~1submit/post | API docs for Transaction submit}
diff --git a/test/fixtures/endpoints.ts b/test/fixtures/endpoints.ts
index 835f97f1..37b7e832 100644
--- a/test/fixtures/endpoints.ts
+++ b/test/fixtures/endpoints.ts
@@ -517,6 +517,27 @@ export default [
     endpointMock: [],
     response: [],
   },
+  {
+    command: (SDK: BlockFrostAPI) =>
+      SDK.txsRequiredSigners(
+        'b024ad35c6309a71a8e613d8bfea2a8185d81eda379ca9128877adefcde1c515',
+      ),
+    path: mainnetUrl(
+      '/txs/b024ad35c6309a71a8e613d8bfea2a8185d81eda379ca9128877adefcde1c515/required_signers',
+    ),
+    endpointMock: [
+      {
+        witness_hash:
+          'db7685e2d763133630e1a4afdefc5752d4b1c9be6c102e71242fb06f',
+      },
+    ],
+    response: [
+      {
+        witness_hash:
+          'db7685e2d763133630e1a4afdefc5752d4b1c9be6c102e71242fb06f',
+      },
+    ],
+  },
   {
     command: (SDK: BlockFrostAPI) =>
       SDK.txsMetadata(
diff --git a/yarn.lock b/yarn.lock
index cf9de71b..c49f5d55 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -33,7 +33,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@blockfrost/blockfrost-js@workspace:."
   dependencies:
-    "@blockfrost/openapi": "npm:0.1.60"
+    "@blockfrost/openapi": "npm:0.1.64"
     "@emurgo/cardano-serialization-lib-nodejs": "npm:^11.5.0"
     "@emurgo/cip14-js": "npm:3.0.1"
     "@types/json-bigint": "npm:^1.0.2"
@@ -63,14 +63,14 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@blockfrost/openapi@npm:0.1.60":
-  version: 0.1.60
-  resolution: "@blockfrost/openapi@npm:0.1.60"
+"@blockfrost/openapi@npm:0.1.64":
+  version: 0.1.64
+  resolution: "@blockfrost/openapi@npm:0.1.64"
   dependencies:
-    ajv: "npm:^8.11.2"
-    cbor: "npm:^8.1.0"
-    yaml: "npm:^2.2.1"
-  checksum: 1f857bda8dc4759d0f11317cd99bf3037e44e3f7cc87518a2af956616155e1c09ca1c85a4e3c9c9258fb0229007337cff29803ab61aca9988bac9408c082e8b2
+    ajv: "npm:^8.12.0"
+    cbor: "npm:^9.0.1"
+    yaml: "npm:^2.3.4"
+  checksum: 85708d9cd529e740572f439c6b92a6c44326f8d78af774dae3c4305faebe0ba9676fbea64e919b383ac6882e54128f02a977b9dff41c40c0dc6078f131392d63
   languageName: node
   linkType: hard
 
@@ -982,7 +982,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ajv@npm:^8.11.2":
+"ajv@npm:^8.12.0":
   version: 8.12.0
   resolution: "ajv@npm:8.12.0"
   dependencies:
@@ -1316,12 +1316,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"cbor@npm:^8.1.0":
-  version: 8.1.0
-  resolution: "cbor@npm:8.1.0"
+"cbor@npm:^9.0.1":
+  version: 9.0.2
+  resolution: "cbor@npm:9.0.2"
   dependencies:
     nofilter: "npm:^3.1.0"
-  checksum: fc6c6d4f8d14def3a0f2ef111f4fc14b3b0bc91d22ed8fd0eb005095c4699c723a45721e515d713571148d0d965ceeb771f4ad422953cb4e9658b379991b52c9
+  checksum: a64f7d4dafed933adeafe7745e2ce9f39a2e669eba73db96de6bd1b39c2dbde4bdd51d0240beed179cc429a7dc8653c8d7c991c5addb9f4e0cee8cd167d87116
   languageName: node
   linkType: hard
 
@@ -4995,10 +4995,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"yaml@npm:^2.2.1":
-  version: 2.2.1
-  resolution: "yaml@npm:2.2.1"
-  checksum: 2e443fed323db4d5ae0c7134c6dbd30cb920e0c8f79a6ce78677731409af83ee2d74a09563fce01503a07f9a02274d42784d816f87294a53b47b955bc83dc655
+"yaml@npm:^2.3.4":
+  version: 2.3.4
+  resolution: "yaml@npm:2.3.4"
+  checksum: f8207ce43065a22268a2806ea6a0fa3974c6fde92b4b2fa0082357e487bc333e85dc518910007e7ac001b532c7c84bd3eccb6c7757e94182b564028b0008f44b
   languageName: node
   linkType: hard