diff --git a/docs/.vuepress/public/presets/toml/plain-text-symbols.toml b/docs/.vuepress/public/presets/toml/plain-text-symbols.toml
index ed9499d2a..550a1b239 100644
--- a/docs/.vuepress/public/presets/toml/plain-text-symbols.toml
+++ b/docs/.vuepress/public/presets/toml/plain-text-symbols.toml
@@ -70,6 +70,9 @@ symbol = "jl "
 [kotlin]
 symbol = "kt "
 
+[lua]
+symbol = "lua "
+
 [nodejs]
 symbol = "nodejs "