diff --git a/update_psa b/update_psa
index ea4d52c..de7eff5 100755
--- a/update_psa
+++ b/update_psa
@@ -89,13 +89,13 @@ update() {
         revert_customer_repository ; exit 1
     fi
 
-    # TODO: implementieren, opkg pakete ausschliessen
-    files=$(changed_file_names)
-    if ! check_md5_for_changed_customer_files $files ; then
+    local files=$(changed_file_names)
+
+    if ! check_md5_for_changed_conf_and_ini_files "$files" ; then
         log_error "$func:${LINENO}: new customer files wrong"
         revert_customer_repository ; exit 1
     fi
-   
+
     if grep -qE ".*opkg_commands.*?" <<< $files; then
         # read opkg_cmds: each line respresents an opkg-command
         readarray opkg_commands < <(cat $opkg_cmds_file)
@@ -125,7 +125,7 @@ update() {
             fi
             
             # perform a dry-run and check if everything might work as expected. 
-            if ! exec_opkg_no_action $opkg_c; then
+            if ! exec_opkg_noaction $opkg_c; then
                     log_error "$func:${LINENO}: "\
                         "opkg --noaction $opkg_c failed"
             fi