diff --git a/src/server/report-exporters.ts b/src/server/report-exporters.ts
index f392532..d91eb4e 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: Buffer
+  buffer: ArrayBuffer
 }
 
 type BaseOptions = {
@@ -123,10 +123,11 @@ export async function buildHoursWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }${options.search ? `-${encodeURIComponent(options.search)}` : ""}.xlsx`
 
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: workbook,
+    buffer: arrayBuffer,
   }
 }
 
@@ -185,10 +186,11 @@ export async function buildBacklogWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: workbook,
+    buffer: arrayBuffer,
   }
 }
 
@@ -232,10 +234,11 @@ export async function buildSlaWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: workbook,
+    buffer: arrayBuffer,
   }
 }
 
@@ -283,10 +286,11 @@ export async function buildCsatWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: workbook,
+    buffer: arrayBuffer,
   }
 }
 
@@ -338,9 +342,10 @@ export async function buildTicketsByChannelWorkbook(
     options.companyId ? `-${options.companyId}` : ""
   }.xlsx`
 
+  const arrayBuffer = workbook.buffer.slice(workbook.byteOffset, workbook.byteOffset + workbook.byteLength)
   return {
     fileName,
     mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
-    buffer: workbook,
+    buffer: arrayBuffer,
   }
 }
diff --git a/src/server/report-schedule-runner.ts b/src/server/report-schedule-runner.ts
index 2fa11ad..2dccd31 100644
--- a/src/server/report-schedule-runner.ts
+++ b/src/server/report-schedule-runner.ts
@@ -149,7 +149,7 @@ export async function runReportSchedules(
           key,
           fileName: artifact.fileName,
           mimeType: artifact.mimeType,
-          data: Buffer.from(artifact.buffer).toString("base64"),
+          data: Buffer.from(new Uint8Array(artifact.buffer)).toString("base64"),
         })
       }