diff --git a/src/lib/qtlib/README.md b/src/lib/qtlib/README.md
index 5bc3150bf26123efc35b3d2d486c12b0f694e1fa..c042d940a2901ad45b5eb37249e495be9f60fd16 100644
--- a/src/lib/qtlib/README.md
+++ b/src/lib/qtlib/README.md
@@ -1,6 +1,6 @@
 # qtlib
 
-A library for Qt app
+A library for Qt app.
 
 Copyright: Akira Ohgaki