diff --git a/configure.ac b/configure.ac
index 54c07a95..2ff20c0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 # Process this file with autoconf to produce a configure script.
-AC_INIT(QjackCtl, 0.4.0.20, rncbc@rncbc.org, qjackctl)
+AC_INIT(QjackCtl, 0.4.0.21, rncbc@rncbc.org, qjackctl)
 
 AC_CONFIG_SRCDIR(src/qjackctl.cpp)
 AC_CONFIG_HEADERS(src/config.h)
diff --git a/src/images/qjackctl.png b/src/images/qjackctl.png
index 2ccc0fb8..8d4d4edf 100644
Binary files a/src/images/qjackctl.png and b/src/images/qjackctl.png differ
diff --git a/src/images/qjackctl_512x512.png b/src/images/qjackctl_512x512.png
new file mode 100644
index 00000000..2ccc0fb8
Binary files /dev/null and b/src/images/qjackctl_512x512.png differ