diff --git a/dot/file/profile b/dot/file/profile
index 5101653..ea0e66b 100755
--- a/dot/file/profile
+++ b/dot/file/profile
@@ -89,6 +89,7 @@ export-loop  \
 	XCALENDAR '$XTERMINAL -e calcurse' \
 	XPUSH_NOTIFICATION_DAEMON 'dunst' \
 	XNOTIFY 'dunstify' \
+	XLOCKER 'swaylock' \
 	SSH_ASKPASS ''\
 
 source-if-exist "$ETC/script/lf.sh"
diff --git a/river/init b/river/init
index 6c0c5c0..3214af1 100755
--- a/river/init
+++ b/river/init
@@ -47,6 +47,9 @@ riverctl map normal Super+Shift Comma send-to-output -current-tags previous
 # bump the focused view to the top of the layout stack
 riverctl map normal Super R zoom
 
+# Lock the screen.
+riverctl map normal Super E spawn "riverctl keyboard-layout us && $XLOCKER"
+
 # Super+H and Super+L to decrease/increase the main ratio of rivertile(1)
 riverctl map -repeat normal Super H send-layout-cmd rivertile "main-ratio -0.05"
 riverctl map -repeat normal Super L send-layout-cmd rivertile "main-ratio +0.05"