diff --git a/tmux-1.9a-0.bee b/tmux-1.9a-0.bee
index 2a2058147..5d25db1d1 100755
--- a/tmux-1.9a-0.bee
+++ b/tmux-1.9a-0.bee
@@ -7,7 +7,7 @@
 ## The source URL(s) define the location of the sources that will be
 ## downloaded. Version variables may be used to simplify reuse of this bee-file.
 
-SRCURL[0]="http://downloads.sourceforge.net/project/tmux/tmux/tmux-1.9/tmux-${PKGVERSION}.tar.gz"
+SRCURL[0]="https://downloads.sourceforge.net/project/tmux/tmux/tmux-1.9/tmux-${PKGVERSION}.tar.gz"
 
 ###############################################################################
 ## Add URLs/pathes to patch files to the PATCHURL array.