diff --git a/install.sh b/install.sh
index 7b0ea39..9d73c69 100755
--- a/install.sh
+++ b/install.sh
@@ -131,25 +131,25 @@ if ping -c 1 $SERVER_IP &>/dev/null; then
 
     log "⬆️ Uploading Darktable DB to Server..."
     UPLOAD_LOG1=\$(mktemp)
-    rsync -avh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$LOCAL_DARKTABLE_DB_DIR/" "$SERVER_USER@$SERVER_IP:$SERVER_DB_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$UPLOAD_LOG1"
+    rsync -uavh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$LOCAL_DARKTABLE_DB_DIR/" "$SERVER_USER@$SERVER_IP:$SERVER_DB_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$UPLOAD_LOG1"
     SENT1=\$(count_synced_files "\$UPLOAD_LOG1" "up")
     rm "\$UPLOAD_LOG1"
 
     log "⬆️ Uploading photos to Server..."
     UPLOAD_LOG2=\$(mktemp)
-    rsync -avh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$LOCAL_PHOTO_DIR/" "$SERVER_USER@$SERVER_IP:$SERVER_PHOTO_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$UPLOAD_LOG2"
+    rsync -uavh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$LOCAL_PHOTO_DIR/" "$SERVER_USER@$SERVER_IP:$SERVER_PHOTO_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$UPLOAD_LOG2"
     SENT2=\$(count_synced_files "\$UPLOAD_LOG2" "up")
     rm "\$UPLOAD_LOG2"
 
     log "⬇️ Downloading DB back from Server..."
     DOWNLOAD_LOG1=\$(mktemp)
-    rsync -avh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$SERVER_USER@$SERVER_IP:$SERVER_DB_DIR/" "$LOCAL_DARKTABLE_DB_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$DOWNLOAD_LOG1"
+    rsync -uavh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$SERVER_USER@$SERVER_IP:$SERVER_DB_DIR/" "$LOCAL_DARKTABLE_DB_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$DOWNLOAD_LOG1"
     RECEIVED1=\$(count_synced_files "\$DOWNLOAD_LOG1" "down")
     rm "\$DOWNLOAD_LOG1"
 
     log "⬇️ Downloading photos from Server..."
     DOWNLOAD_LOG2=\$(mktemp)
-    rsync -avh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$SERVER_USER@$SERVER_IP:$SERVER_PHOTO_DIR/" "$LOCAL_PHOTO_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$DOWNLOAD_LOG2"
+    rsync -uavh --itemize-changes -e "ssh -p $SERVER_SSH_PORT" "$SERVER_USER@$SERVER_IP:$SERVER_PHOTO_DIR/" "$LOCAL_PHOTO_DIR/" 2>&1 | tee -a "\$SYNC_LOG" "\$DOWNLOAD_LOG2"
     RECEIVED2=\$(count_synced_files "\$DOWNLOAD_LOG2" "down")
     rm "\$DOWNLOAD_LOG2"