diff --git a/src/Data/Number.php b/src/Data/Number.php
index 49ef24ddf..7c0a03446 100644
--- a/src/Data/Number.php
+++ b/src/Data/Number.php
@@ -12,7 +12,7 @@ namespace chillerlan\QRCode\Data;
 
 use chillerlan\QRCode\Common\{BitBuffer, Mode};
 
-use function array_flip, ceil, ord, sprintf, str_split, substr;
+use function array_flip, ceil, ord, str_split, substr;
 
 /**
  * Numeric mode: decimal digits 0 to 9