diff --git a/template-update.sh b/template-update.sh
index 8129d4f..45d345a 100755
--- a/template-update.sh
+++ b/template-update.sh
@@ -48,7 +48,7 @@ fi
 
 ### check for updates to this script
 printf "Checking for updates to this script... "
-repoScriptChecksum=$( grep "$repoScriptName" files.sha256 | grep -o '^\S*' )
+repoScriptChecksum=$( grep "$repoScriptName" "$checksumFilename" | grep -o '^\S*' )
 localScriptChecksum=$( sha256sum "$localScriptName" | grep -o '^\S*' )
 if [ "$localScriptChecksum" = "$repoScriptChecksum" ]; then
     printf "[NONE]\n\n"
@@ -79,7 +79,7 @@ shift
 for file; do
     updateTarget="$file"
     printf "Checking '%s' for updates... " "$updateTarget"
-    repoFile=$( grep "$updateTarget" files.sha256 | grep -o '^\S*' )
+    repoFile=$( grep "$updateTarget" "$checksumFilename" | grep -o '^\S*' )
     if [ -f "$file" ]; then
         localFile=$( sha256sum "$updateTarget" | grep -o '^\S*' )
     else