diff --git a/.licensure.yml b/.licensure.yml
index f3f009c..f0ac6e7 100644
--- a/.licensure.yml
+++ b/.licensure.yml
@@ -135,6 +135,22 @@ comments:
       comment_char: "//"
       trailing_lines: 1
 
+  - extensions:
+      - lua
+    # The commenter field defines the kind of commenter to
+    # generate. There are two types of commenters: line and block.
+    #
+    # This demonstrates a line commenter configuration. A line
+    # commenter type will apply the comment_char to the beginning of
+    # each line in the license header. It will then apply a number of
+    # empty newlines to the end of the header equal to trailing_lines.
+    #
+    # If trailing_lines is omitted it is assumed to be 0.
+    commenter:
+      type: line
+      comment_char: "--"
+      trailing_lines: 1
+
   - extensions:
       - rs
       - tri
@@ -161,6 +177,8 @@ comments:
   - extension:
       - html
       - md
+      - svg
+      - drawio
     commenter:
       type: block
       start_block_char: "<!--\n"
diff --git a/scripts/renew_copyright_header.sh b/scripts/renew_copyright_header.sh
old mode 100755
new mode 100644
index 451ac79..d7b0c8f
--- a/scripts/renew_copyright_header.sh
+++ b/scripts/renew_copyright_header.sh
@@ -41,7 +41,7 @@ remove() {
     # formatters do weird things to the file
     case "$extension" in
     # normal '#' comments (these are $TEMPLATE_LINE_LENGTH lines long)
-    "Makefile" | "toml" | "envrc" | "yml" | "gitignore" | "awk")
+    "Makefile" | "toml" | "envrc" | "yml" | "gitignore" | "awk" | "lua")
         sed --in-place "1,${TEMPLATE_LINE_LENGTH}d" "$file"
         ;;
     # LaTeX files (or TeX files in general) have a different license, use the
@@ -50,7 +50,7 @@ remove() {
         sed --in-place "1,${LATEX_TEMPLATE_LINE_LENGTH}d" "$file"
         ;;
     # normal '/* ... */' like comments (these are $TEMPLATE_LINE_LENGTH + 2 lines long)
-    "c" | "h" | "md" | "rs")
+    "c" | "h" | "md" | "rs" | "html" | "svg" | "drawio")
         length="$((TEMPLATE_LINE_LENGTH + 2))"
         sed --in-place "1,${length}d;" "$file"
         ;;