diff --git a/cmd/server/main.go b/cmd/server/main.go
index a09e5a3..f6455ac 100644
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -70,6 +70,9 @@ func main() {
 	// Create library service
 	libraryService := services.NewLibraryService(queries)
 
+	// Sync Go AllowedExtensions into DB so API clients see correct extensions
+	libraryService.SyncAllowedExtensions(context.Background())
+
 	// Create worker for background tasks
 	worker := services.NewWorker(3, connManager)
 	services.WorkerInstance = worker