diff --git a/package-lock.json b/package-lock.json
index 9ec15c72..09cfae22 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,11 +9,13 @@
       "version": "0.18.0",
       "dependencies": {
         "async": "^3.2.5",
-        "pdf-lib": "^1.17.1"
+        "pdf-lib": "^1.17.1",
+        "uuid": "^10.0.0"
       },
       "devDependencies": {
         "@types/async": "^3.2.24",
         "@types/jest": "^29.5.12",
+        "@types/uuid": "^10.0.0",
         "@typescript-eslint/eslint-plugin": "^7.7.1",
         "@typescript-eslint/parser": "^7.7.1",
         "eslint": "^8.57.0",
@@ -1480,6 +1482,12 @@
       "integrity": "sha512-9aEbYZ3TbYMznPdcdr3SmIrLXwC/AKZXQeCf9Pgao5CKb8CyHuEX5jzWPTkvregvhRJHcpRO6BFoGW9ycaOkYw==",
       "dev": true
     },
+    "node_modules/@types/uuid": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-10.0.0.tgz",
+      "integrity": "sha512-7gqG38EyHgyP1S+7+xomFtL+ZNHcKv6DwNaCZmJmo1vgMugyF3TCnXVg4t1uk89mLNwnLtnY3TpOpCOyp1/xHQ==",
+      "dev": true
+    },
     "node_modules/@types/yargs": {
       "version": "17.0.32",
       "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-17.0.32.tgz",
@@ -6190,6 +6198,18 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/uuid": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-10.0.0.tgz",
+      "integrity": "sha512-8XkAphELsDnEGrDxUOHB3RGvXz6TeuYSGEZBOjtTtPm2lwhGBjLgOzLHB63IUWfBpNucQjND6d3AOudO+H3RWQ==",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
     "node_modules/v8-compile-cache-lib": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",
@@ -7530,6 +7550,12 @@
       "integrity": "sha512-9aEbYZ3TbYMznPdcdr3SmIrLXwC/AKZXQeCf9Pgao5CKb8CyHuEX5jzWPTkvregvhRJHcpRO6BFoGW9ycaOkYw==",
       "dev": true
     },
+    "@types/uuid": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-10.0.0.tgz",
+      "integrity": "sha512-7gqG38EyHgyP1S+7+xomFtL+ZNHcKv6DwNaCZmJmo1vgMugyF3TCnXVg4t1uk89mLNwnLtnY3TpOpCOyp1/xHQ==",
+      "dev": true
+    },
     "@types/yargs": {
       "version": "17.0.32",
       "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-17.0.32.tgz",
@@ -10904,6 +10930,11 @@
         "punycode": "^2.1.0"
       }
     },
+    "uuid": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-10.0.0.tgz",
+      "integrity": "sha512-8XkAphELsDnEGrDxUOHB3RGvXz6TeuYSGEZBOjtTtPm2lwhGBjLgOzLHB63IUWfBpNucQjND6d3AOudO+H3RWQ=="
+    },
     "v8-compile-cache-lib": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz",
diff --git a/package.json b/package.json
index f876c207..af26afb0 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,7 @@
   "devDependencies": {
     "@types/async": "^3.2.24",
     "@types/jest": "^29.5.12",
+    "@types/uuid": "^10.0.0",
     "@typescript-eslint/eslint-plugin": "^7.7.1",
     "@typescript-eslint/parser": "^7.7.1",
     "eslint": "^8.57.0",
@@ -32,6 +33,7 @@
   },
   "dependencies": {
     "async": "^3.2.5",
-    "pdf-lib": "^1.17.1"
+    "pdf-lib": "^1.17.1",
+    "uuid": "^10.0.0"
   }
 }
diff --git a/src/hooks/custom/SplitPdfHook.ts b/src/hooks/custom/SplitPdfHook.ts
index f6237836..87904f12 100644
--- a/src/hooks/custom/SplitPdfHook.ts
+++ b/src/hooks/custom/SplitPdfHook.ts
@@ -1,4 +1,5 @@
 import async from "async";
+import { v4 as uuidv4 } from 'uuid';
 
 import {
   AfterErrorContext,
@@ -96,7 +97,11 @@ export class SplitPdfHook
     hookCtx: BeforeRequestContext,
     request: Request
   ): Promise<Request> {
-    const { operationID } = hookCtx;
+
+    // setting the current operationID to be unique
+    const operationID = "partition-" + uuidv4();
+    hookCtx.operationID = operationID;
+
     const requestClone = request.clone();
     const formData = await requestClone.formData();
     const splitPdfPage = stringToBoolean(
diff --git a/test/integration/SplitPdfHook.test.ts b/test/integration/SplitPdfHook.test.ts
index ed2b431e..bad3df35 100644
--- a/test/integration/SplitPdfHook.test.ts
+++ b/test/integration/SplitPdfHook.test.ts
@@ -392,4 +392,78 @@ describe("SplitPDF succeeds for large PDF with high concurrency", () => {
         expect(res.elements?.length).toBeGreaterThan(0);
     },
     300000);
-});
\ No newline at end of file
+});
+
+
+describe("SplitPDF async can be used to send multiple files concurrently", () => {
+  const FAKE_API_KEY = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+
+  it.each([
+    `${localServer}/general/v0/general`,
+  ])("succeed", async (serverURL) => {
+      const client = new UnstructuredClient({
+          serverURL: serverURL,
+          security: {
+              apiKeyAuth: FAKE_API_KEY,
+          },
+      });
+
+      const file = {
+          content: readFileSync("test/data/layout-parser-paper.pdf"),
+          fileName: "test/data/layout-parser-paper.pdf"
+      };
+
+      const RequestsParams = [
+        {
+            files: file,
+            splitPdfPage: true,
+            strategy: Strategy.Fast,
+            splitPdfPageRange: [1, 3],
+            languages: ["eng"],
+        },
+        {
+            files: file,
+            splitPdfPage: true,
+            strategy: Strategy.Fast,
+            splitPdfPageRange: [10, 12],
+            languages: ["eng"],
+        }
+      ];
+
+      // Process requests serially
+      const serialElements: any[][] = [];
+      for (const requestParams of RequestsParams) {
+        const res: PartitionResponse = await client.general.partition({
+          partitionParameters: {
+            ...requestParams
+          },
+        });
+        expect(res.statusCode).toEqual(200);
+        expect(res.elements?.length).toBeGreaterThan(0);
+        if (res.elements) {
+          serialElements.push(res.elements);
+        }
+      }
+
+      // Process requests concurrently
+      const concurrentElements: any[][] = [];
+      const concurrentResponses = await Promise.all(RequestsParams.map(req =>
+        client.general.partition({
+            partitionParameters: req
+        })
+      ));
+
+      for (const res of concurrentResponses) {
+        expect(res.statusCode).toEqual(200);
+        expect(res.elements?.length).toBeGreaterThan(0);
+        if (res.elements) {
+          concurrentElements.push(res.elements);
+        }
+      }
+
+      const isEqual = JSON.stringify(serialElements) === JSON.stringify(concurrentElements);
+      expect(isEqual).toBe(true);
+
+  },
+  300000);
+});