diff --git a/extensions/vw/pdfjs/wicket/ui/src/main/java/org/apache/causeway/extensions/pdfjs/wkt/ui/components/PdfJsViewerPanel.java b/extensions/vw/pdfjs/wicket/ui/src/main/java/org/apache/causeway/extensions/pdfjs/wkt/ui/components/PdfJsViewerPanel.java
index 167f10c0d1f..27c86dbaac0 100644
--- a/extensions/vw/pdfjs/wicket/ui/src/main/java/org/apache/causeway/extensions/pdfjs/wkt/ui/components/PdfJsViewerPanel.java
+++ b/extensions/vw/pdfjs/wicket/ui/src/main/java/org/apache/causeway/extensions/pdfjs/wkt/ui/components/PdfJsViewerPanel.java
@@ -182,17 +182,20 @@ protected MarkupContainer createRegularFrame() {
             return createShallowRegularFrame();
         }
 
-        val scalarModel = scalarModel();
+        val attributeModel = scalarModel();
 
         val regularFrame = new WebMarkupContainer(ID_SCALAR_IF_REGULAR);
 
+        var documentUrl = urlFor(
+                new ListenerRequestHandler(
+                        new PageAndComponentProvider(getPage(), this)))
+                // adds a hash to the URL, such that browser caching works as desired
+                + "&md5=" + blob.md5Hex();
         val pdfJsConfig =
-                scalarModel.getMetaModel().lookupFacet(PdfJsViewerFacet.class)
+                attributeModel.getMetaModel().lookupFacet(PdfJsViewerFacet.class)
                 .map(pdfJsViewerFacet->pdfJsViewerFacet.configFor(buildKey()))
                 .orElseGet(PdfJsConfig::new)
-                .withDocumentUrl(urlFor(
-                        new ListenerRequestHandler(
-                                new PageAndComponentProvider(getPage(), this))));
+                .withDocumentUrl(documentUrl);
 
         val pdfJsPanel = new PdfJsPanel(ID_SCALAR_VALUE, pdfJsConfig);
 
diff --git a/viewers/wicket/ui/src/main/java/org/apache/causeway/viewer/wicket/ui/util/Wkt.java b/viewers/wicket/ui/src/main/java/org/apache/causeway/viewer/wicket/ui/util/Wkt.java
index 2bbf5569ee0..504c3ae8fc5 100644
--- a/viewers/wicket/ui/src/main/java/org/apache/causeway/viewer/wicket/ui/util/Wkt.java
+++ b/viewers/wicket/ui/src/main/java/org/apache/causeway/viewer/wicket/ui/util/Wkt.java
@@ -22,6 +22,7 @@
 
 import java.io.File;
 import java.io.Serializable;
+import java.time.Duration;
 import java.util.List;
 import java.util.Optional;
 import java.util.OptionalInt;
@@ -651,6 +652,7 @@ public void fileDownloadClickHandler(final IModel<File> model, final CommonMimeT
         RequestCycle.get().scheduleRequestHandlerAfterCurrent(
                 Wkt.fileResourceStreamRequestHandler(file, mime)
                 .setFileName(fileName)
+                .setCacheDuration(Duration.ZERO)
                 .setContentDisposition(ContentDisposition.ATTACHMENT));
     }