diff --git a/latex/fmt/Dockerfile b/latex/fmt/Dockerfile
index 55b4dad..9d3f0ab 100644
--- a/latex/fmt/Dockerfile
+++ b/latex/fmt/Dockerfile
@@ -7,4 +7,4 @@ RUN apk add texlive-binextra perl-file-homedir perl-yaml-tiny
 COPY ./format.sh /root/
 RUN chmod +x /root/format.sh
 
-CMD [ "/root/format.sh" ]
+ENTRYPOINT [ "/root/format.sh" ]
diff --git a/latex/fmt/format.sh b/latex/fmt/format.sh
index 5e23010..92e352d 100755
--- a/latex/fmt/format.sh
+++ b/latex/fmt/format.sh
@@ -12,6 +12,12 @@ idx=1
 total=$(echo "$files" | wc -l)
 for file in $files; do
     echo "Processing file $idx / $total"
-	latexindent -s -w $file
-    ((idx++))
+	latexindent -s -w -l $file
+    idx=$((idx + 1))
+done
+
+echo "Cleaning up..."
+backups=$(find . -type f | grep "\.bak")
+for backup in $backups; do
+    rm $backup
 done