diff --git a/src/server/report-exporters.ts b/src/server/report-exporters.ts
index c119c26..f392532 100644
--- a/src/server/report-exporters.ts
+++ b/src/server/report-exporters.ts
@@ -48,7 +48,7 @@ export async function createConvexContext(identity: ViewerIdentity): Promise<Con
 export type ReportArtifact = {
   fileName: string
   mimeType: string
-  buffer: Uint8Array
+  buffer: Buffer
 }
 
 type BaseOptions = {
@@ -126,7 +126,7 @@ export async function buildHoursWorkbook(
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: new Uint8Array(workbook),
+    buffer: workbook,
   }
 }
 
@@ -188,7 +188,7 @@ export async function buildBacklogWorkbook(
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: new Uint8Array(workbook),
+    buffer: workbook,
   }
 }
 
@@ -235,7 +235,7 @@ export async function buildSlaWorkbook(
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: new Uint8Array(workbook),
+    buffer: workbook,
   }
 }
 
@@ -286,7 +286,7 @@ export async function buildCsatWorkbook(
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: new Uint8Array(workbook),
+    buffer: workbook,
   }
 }
 
@@ -341,6 +341,6 @@ export async function buildTicketsByChannelWorkbook(
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: new Uint8Array(workbook),
+    buffer: workbook,
   }
 }