diff --git a/MANUAL.txt b/MANUAL.txt
index 8767400c..9daf857f 100644
--- a/MANUAL.txt
+++ b/MANUAL.txt
@@ -1,4 +1,4 @@
-oxipng 9.1.0
+oxipng 9.1.1
 Losslessly improve compression of PNG files
 
 Usage: oxipng [OPTIONS] <files>...