diff --git a/src/main/java/stirling/software/SPDF/controller/api/AnalysisController.java b/src/main/java/stirling/software/SPDF/controller/api/AnalysisController.java
index 334c44480..49c5bc81c 100644
--- a/src/main/java/stirling/software/SPDF/controller/api/AnalysisController.java
+++ b/src/main/java/stirling/software/SPDF/controller/api/AnalysisController.java
@@ -59,6 +59,7 @@ public class AnalysisController {
             description = "Returns title, author, subject, etc. Input:PDF Output:JSON Type:SISO")
     public Map<String, String> getDocumentProperties(@ModelAttribute PDFFile file)
             throws IOException {
+        // Load the document in read-only mode to prevent modifications and ensure the integrity of the original file.
         try (PDDocument document = pdfDocumentFactory.load(file.getFileInput(), true)) {
             PDDocumentInformation info = document.getDocumentInformation();
             Map<String, String> properties = new HashMap<>();