diff --git a/config/config.json b/config/config.json
index 30c69dc..ab42d79 100644
--- a/config/config.json
+++ b/config/config.json
@@ -67,6 +67,14 @@
           "external": "~/.xinitrc"
         }
       ]
+    },
+    "redshift": {
+      "files": [
+        {
+          "internal": "config/redshift/redshift.conf",
+          "external": "~/.config/redshift/redshift.conf"
+        }
+      ]
     }
   }
 }
diff --git a/config/i3/config b/config/i3/config
index d81629e..fcdbea8 100644
--- a/config/i3/config
+++ b/config/i3/config
@@ -8,6 +8,10 @@ font pango:Cascadia Code 12
 # https://wiki.archlinux.org/index.php/Feh
 exec --no-startup-id feh --no-fehbg --bg-fill --randomize /usr/share/backgrounds/archlinux/* 
 
+# redshift
+# https://wiki.archlinux.org/index.php/Redshift
+exec --no-startup-id redshift-gtk
+
 # i3lock
 bindsym $mod+l exec --no-startup-id i3lock -e -c 000000
 
diff --git a/config/redshift/redshift.conf b/config/redshift/redshift.conf
new file mode 100644
index 0000000..4cdf6ec
--- /dev/null
+++ b/config/redshift/redshift.conf
@@ -0,0 +1,7 @@
+[redshift]
+location-provider=manual
+
+[manual]
+; Ho Chi Minh, Vietnam
+lat=10.8188
+lon=106.65186