diff --git a/apps/previewgenerator.sh b/apps/previewgenerator.sh
index 1c672cac..f2c7770f 100644
--- a/apps/previewgenerator.sh
+++ b/apps/previewgenerator.sh
@@ -125,6 +125,12 @@ then
     then
         install_if_not libmagickcore-6.q16-3-extra
     fi
+    # Memory tuning
+    sed -i 's|policy domain="resource" name="memory" value=.*|policy domain="resource" name="memory" value="512MiB"|g' /etc/ImageMagick-6/policy.xml
+    sed -i 's|policy domain="resource" name="map" value=.*|policy domain="resource" name="map" value="1024MiB"|g' /etc/ImageMagick-6/policy.xml
+    sed -i 's|policy domain="resource" name="area" value=.*|policy domain="resource" name="area" value="256MiB"|g' /etc/ImageMagick-6/policy.xml
+    sed -i 's|policy domain="resource" name="disk" value=.*|policy domain="resource" name="disk" value="8GiB"|g' /etc/ImageMagick-6/policy.xml
+    
     # Choose file formats fo the case when imagick is installed.
     # for additional previews please look at the Nextcloud documentation. But these probably won't work.
     choice=$(whiptail --title "$TITLE - Choose file formats" --checklist \