diff --git a/karahti b/karahti
index 3b7d469..0abf484 100755
--- a/karahti
+++ b/karahti
@@ -42,7 +42,7 @@ while (( $# )); do
   shift
 done
 
-lang=${opts[lang]:-auto}
+lang=${opts[lang]:-auto} lang=${lang,,}
 expiry=${opts[expire]}
 url=${opts[url]:-https://p.ahti.space/nanopaste-get.cgi}