diff --git a/documentation/backend/database.md b/documentation/backend/database.md
index a16df96..c1811fb 100644
--- a/documentation/backend/database.md
+++ b/documentation/backend/database.md
@@ -35,7 +35,7 @@ PostgreSQL database storing users, audiobooks, requests, downloads, configuratio
 
 ### Plex_Library (Library Cache)
 - `id` (UUID PK), `plex_guid` (unique, external ID from Plex or Audiobookshelf), `plex_rating_key`
-- `title`, `author`, `narrator`, `summary`, `duration` (milliseconds), `year`, `user_rating` (0-10 scale)
+- `title`, `author`, `narrator`, `summary`, `duration` (BigInt, milliseconds), `year`, `user_rating` (0-10 scale)
 - **Universal identifiers:** `asin` (Audible ASIN), `isbn` (ISBN-10 or ISBN-13)
 - `file_path`, `thumb_url`, `cached_library_cover_path` (local cached cover path), `plex_library_id`, `added_at`
 - `last_scanned_at`, `created_at`, `updated_at`
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index c3ee742..1e4c2cf 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -132,7 +132,7 @@ model PlexLibrary {
   author     String
   narrator   String?
   summary    String?  @db.Text
-  duration   Int? // Duration in milliseconds (Plex format)
+  duration   BigInt? // Duration in milliseconds (Plex format)
   year       Int?
   userRating Decimal? @map("user_rating") @db.Decimal(3, 1) // User's rating (0-10 scale from Plex)
 
diff --git a/src/lib/processors/plex-recently-added.processor.ts b/src/lib/processors/plex-recently-added.processor.ts
index 4bf45ce..7dcb1cd 100644
--- a/src/lib/processors/plex-recently-added.processor.ts
+++ b/src/lib/processors/plex-recently-added.processor.ts
@@ -106,7 +106,7 @@ export async function processPlexRecentlyAddedCheck(payload: PlexRecentlyAddedPa
             author: item.author || 'Unknown Author',
             narrator: item.narrator,
             summary: item.description,
-            duration: item.duration ? item.duration * 1000 : null, // Convert seconds to milliseconds
+            duration: item.duration ? BigInt(Math.round(item.duration * 1000)) : null, // Convert seconds to milliseconds
             year: item.year,
             asin: item.asin,  // Store ASIN from library backend
             isbn: item.isbn,  // Store ISBN from library backend
@@ -146,7 +146,7 @@ export async function processPlexRecentlyAddedCheck(payload: PlexRecentlyAddedPa
             author: item.author || existing.author,
             narrator: item.narrator || existing.narrator,
             summary: item.description || existing.summary,
-            duration: item.duration ? item.duration * 1000 : existing.duration,
+            duration: item.duration ? BigInt(Math.round(item.duration * 1000)) : existing.duration,
             year: item.year || existing.year,
             asin: item.asin || existing.asin,  // Update ASIN if available
             isbn: item.isbn || existing.isbn,  // Update ISBN if available
diff --git a/src/lib/processors/scan-plex.processor.ts b/src/lib/processors/scan-plex.processor.ts
index 4dfaf85..708045d 100644
--- a/src/lib/processors/scan-plex.processor.ts
+++ b/src/lib/processors/scan-plex.processor.ts
@@ -90,7 +90,7 @@ export async function processScanPlex(payload: ScanPlexPayload): Promise<any> {
               author: item.author || existing.author,
               narrator: item.narrator || existing.narrator,
               summary: item.description || existing.summary,
-              duration: item.duration ? item.duration * 1000 : existing.duration, // Convert seconds to milliseconds
+              duration: item.duration ? BigInt(Math.round(item.duration * 1000)) : existing.duration, // Convert seconds to milliseconds
               year: item.year || existing.year,
               asin: item.asin || existing.asin,  // Store ASIN from library backend
               isbn: item.isbn || existing.isbn,  // Store ISBN from library backend
@@ -132,7 +132,7 @@ export async function processScanPlex(payload: ScanPlexPayload): Promise<any> {
               author: item.author || 'Unknown Author',
               narrator: item.narrator,
               summary: item.description,
-              duration: item.duration ? item.duration * 1000 : null, // Convert seconds to milliseconds
+              duration: item.duration ? BigInt(Math.round(item.duration * 1000)) : null, // Convert seconds to milliseconds
               year: item.year,
               asin: item.asin,  // Store ASIN from library backend (Plex or Audiobookshelf)
               isbn: item.isbn,  // Store ISBN from library backend