diff --git a/app/actions/definitions/documents.tsx b/app/actions/definitions/documents.tsx
index 7c77a57edc..819251cc2b 100644
--- a/app/actions/definitions/documents.tsx
+++ b/app/actions/definitions/documents.tsx
@@ -38,6 +38,7 @@ import Icon from "@shared/components/Icon";
 import type { NavigationNode } from "@shared/types";
 import { ExportContentType, TeamPreference } from "@shared/types";
 import { getEventFiles } from "@shared/utils/files";
+import { Week } from "@shared/utils/time";
 import type UserMembership from "~/models/UserMembership";
 import { client } from "~/utils/ApiClient";
 import DocumentDelete from "~/scenes/DocumentDelete";
@@ -630,7 +631,7 @@ export const copyDocumentAsMarkdown = createAction({
     if (document) {
       const res = await client.post("/documents.export", {
         id: document.id,
-        signedUrls: 3600 * 24 * 30, // 30 days
+        signedUrls: Week.seconds, // 7 days (AWS S3 max for presigned URLs)
       });
       copy(res.data);
       toast.success(t("Markdown copied to clipboard"));
diff --git a/server/storage/files/BaseStorage.ts b/server/storage/files/BaseStorage.ts
index c947aa436b..980cb872d9 100644
--- a/server/storage/files/BaseStorage.ts
+++ b/server/storage/files/BaseStorage.ts
@@ -4,6 +4,7 @@ import type { PresignedPost } from "@aws-sdk/s3-presigned-post";
 import omit from "lodash/omit";
 import FileHelper from "@shared/editor/lib/FileHelper";
 import { isBase64Url, isInternalUrl } from "@shared/utils/urls";
+import { Week } from "@shared/utils/time";
 import env from "@server/env";
 import Logger from "@server/logging/Logger";
 import type { RequestInit } from "@server/utils/fetch";
@@ -14,6 +15,12 @@ export default abstract class BaseStorage {
   /** The default number of seconds until a signed URL expires. */
   public static defaultSignedUrlExpires = 300;
 
+  /**
+   * The maximum number of seconds until a signed URL expires for S3 Signature V4.
+   * AWS S3 Signature V4 presigned URLs must have an expiration date less than one week in the future.
+   */
+  public static maxSignedUrlExpires = Week.seconds;
+
   /**
    * Returns a presigned post for uploading files to the storage provider.
    *
diff --git a/server/storage/files/S3Storage.test.ts b/server/storage/files/S3Storage.test.ts
new file mode 100644
index 0000000000..8cb8e4e184
--- /dev/null
+++ b/server/storage/files/S3Storage.test.ts
@@ -0,0 +1,40 @@
+import { Week, Day } from "@shared/utils/time";
+import BaseStorage from "./BaseStorage";
+
+describe("S3Storage", () => {
+  describe("getSignedUrl expiration limits", () => {
+    it("should define maximum expiration as 7 days for AWS S3 Signature V4", () => {
+      // AWS S3 Signature V4 presigned URLs have a maximum expiration of 7 days
+      const maxExpiration = Week.seconds;
+
+      // Verify our constant matches AWS limit
+      expect(BaseStorage.maxSignedUrlExpires).toBe(maxExpiration);
+      expect(BaseStorage.maxSignedUrlExpires).toBe(604800); // 7 days in seconds
+    });
+
+    it("should have Week.seconds equal to 7 days", () => {
+      expect(Week.seconds).toBe(7 * 24 * 60 * 60);
+      expect(Week.seconds).toBe(604800);
+    });
+
+    it("should ensure 30 days exceeds the limit", () => {
+      const thirtyDays = 30 * Day.seconds;
+      expect(thirtyDays).toBeGreaterThan(BaseStorage.maxSignedUrlExpires);
+      expect(thirtyDays).toBe(2592000); // 30 days in seconds
+    });
+
+    it("should ensure 4 days is within the limit", () => {
+      const fourDays = 4 * Day.seconds;
+      expect(fourDays).toBeLessThan(BaseStorage.maxSignedUrlExpires);
+      expect(fourDays).toBe(345600); // 4 days in seconds
+    });
+
+    it("should clamp values that exceed the limit", () => {
+      const thirtyDays = 30 * Day.seconds;
+      const clampedValue = Math.min(thirtyDays, BaseStorage.maxSignedUrlExpires);
+      
+      expect(clampedValue).toBe(BaseStorage.maxSignedUrlExpires);
+      expect(clampedValue).toBe(Week.seconds);
+    });
+  });
+});
diff --git a/server/storage/files/S3Storage.ts b/server/storage/files/S3Storage.ts
index a31192a593..53ca4092a7 100644
--- a/server/storage/files/S3Storage.ts
+++ b/server/storage/files/S3Storage.ts
@@ -152,8 +152,11 @@ export default class S3Storage extends BaseStorage {
     if (isDocker) {
       return `${this.getPublicEndpoint()}/${key}`;
     } else {
+      // Ensure expiration does not exceed AWS S3 Signature V4 limit of 7 days
+      const clampedExpiresIn = Math.min(expiresIn, S3Storage.maxSignedUrlExpires);
+
       const command = new GetObjectCommand(params);
-      const url = await getSignedUrl(this.client, command, { expiresIn });
+      const url = await getSignedUrl(this.client, command, { expiresIn: clampedExpiresIn });
 
       if (env.AWS_S3_ACCELERATE_URL) {
         return url.replace(
diff --git a/shared/utils/time.ts b/shared/utils/time.ts
index ae8ac5a489..a1c8a28732 100644
--- a/shared/utils/time.ts
+++ b/shared/utils/time.ts
@@ -27,3 +27,14 @@ export class Day {
   /** Minutes in a day */
   public static minutes = 24 * Hour.minutes;
 }
+
+export class Week {
+  /** Milliseconds in a week */
+  public static ms = 7 * Day.ms;
+  /** Seconds in a week */
+  public static seconds = 7 * Day.seconds;
+  /** Minutes in a week */
+  public static minutes = 7 * Day.minutes;
+  /** Days in a week */
+  public static days = 7;
+}