diff --git a/config.h b/config.h
index 4c818f8..3bb7038 100644
--- a/config.h
+++ b/config.h
@@ -75,6 +75,7 @@ static const Layout layouts[] = {
 static char dmenumon[2] = "0"; /* component of dmenucmd, manipulated in spawn() */
 static const char *dmenucmd[] = { "dmenu_run", "-m", dmenumon, "-fn", dmenufont, "-nb", col_norm_bg, "-nf", col_norm_fg, "-sb", col_sel_bg, "-sf", col_sel_fg, NULL };
 static const char *termcmd[]  = { "urxvt256c", NULL };
+static const char *lockcmd[]  = { "slock", NULL };
 
 static Key keys[] = {
 	/* modifier                     key        function        argument */
@@ -111,6 +112,7 @@ static Key keys[] = {
 	TAGKEYS(                        XK_8,                      7)
 	TAGKEYS(                        XK_9,                      8)
 	{ MODKEY|ShiftMask,             XK_q,      quit,           {0} },
+	{ MODKEY|ShiftMask,             XK_l,      spawn,          {.v = lockcmd } },
 };
 
 /* button definitions */
diff --git a/dwm b/dwm
index df167f0..8429425 100755
Binary files a/dwm and b/dwm differ
diff --git a/dwm.o b/dwm.o
index f7194cc..da8f1d1 100644
Binary files a/dwm.o and b/dwm.o differ