diff --git a/src/main/java/stirling/software/SPDF/controller/api/SplitPdfBySectionsController.java b/src/main/java/stirling/software/SPDF/controller/api/SplitPdfBySectionsController.java
index 29040a60..816ea6d5 100644
--- a/src/main/java/stirling/software/SPDF/controller/api/SplitPdfBySectionsController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/SplitPdfBySectionsController.java
@@ -100,6 +100,8 @@ public class SplitPdfBySectionsController {
 
                 if (sectionNum == horiz * verti) pageNum++;
             }
+
+            zipOut.finish();
             data = Files.readAllBytes(zipFile);
             return WebResponseUtils.bytesToWebResponse(
                     data, filename + "_split.zip", MediaType.APPLICATION_OCTET_STREAM);