diff --git a/genlog.sh b/genlog.sh
index a3933b7..8ff7783 100755
--- a/genlog.sh
+++ b/genlog.sh
@@ -72,15 +72,18 @@ do
     # converting .gmi files in .html
     /usr/local/bin/gmnitohtml < "$gmi_file" > "$tempdir/body.html"
 
+    cp "$tempdir/body.html" "$tempdir/work-body.html"
+
     # trick to support h4 titles
-    lines=$(grep "<h3># .*<\/h3>" "$tempdir/body.html")
-    while read -r line; do
-        fixed_line=${line//<h3># /<h4>}  # replace '<h3># ' by '<h4>'
-        fixed_line=${fixed_line//<\/h3>/<\/h4>}  # replace '</h3>' by '</h4>'
-        # shellcheck disable=SC2001
-        fixed_line=$(echo "$fixed_line" | sed "s#&#\\\&#g")  # escape eventual '&'
-        sed -i "s^${line}^${fixed_line}^" "$tempdir/body.html"
-    done <<< "$lines"
+    while IFS= read -r line; do
+        if echo $ "$line" | grep -q "<h3># .*<\/h3>"; then
+            fixed_line=${line//<h3># /<h4>}  # replace '<h3># ' by '<h4>'
+            fixed_line=${fixed_line//<\/h3>/<\/h4>}  # replace '</h3>' by '</h4>'
+            # shellcheck disable=SC2001
+            fixed_line=$(echo "$fixed_line" | sed "s#&#\\\&#g")  # escape eventual '&'
+            sed -i "s^${line}^${fixed_line}^" "$tempdir/body.html"
+        fi
+    done < "$tempdir/work-body.html"
 
     # retrieving of the path of the current .gmi file
     file_path="$(dirname "$gmi_file")"