diff --git a/sway/gammastep.pl b/sway/gammastep.pl
index 3d6e80f..69878af 100755
--- a/sway/gammastep.pl
+++ b/sway/gammastep.pl
@@ -17,7 +17,7 @@ unless ($pid) {
         open STDOUT, '>>/dev/null';
         open STDERR, '>>/dev/null';
 
-        `gammastep -l $lat_lon -b 0.7:0.3`;
+        exec "exec gammastep -l $lat_lon -b 0.7:0.3";
 }
 
 sub fetch_lat_lon