diff --git a/.config/openbox/rc.xml b/.config/openbox/rc.xml
index 4f7e7e8..afd1e72 100644
--- a/.config/openbox/rc.xml
+++ b/.config/openbox/rc.xml
@@ -334,6 +334,16 @@
       </action>
     </keybind>
     <!-- Find the sound card id by looking into /proc/asound/cards and pass it by using the -c option-->
+    <keybind key="S-KP_Add">
+      <action name="Execute">
+        <execute>amixer -D pulse set Master 5%+ unmute</execute>
+      </action>
+    </keybind>
+    <keybind key="S-KP_Subtract">
+      <action name="Execute">
+        <execute>amixer -D pulse set Master 5%- unmute</execute>
+      </action>
+    </keybind>
     <keybind key="XF86AudioRaiseVolume">
       <action name="Execute">
         <execute>amixer -D pulse set Master 5%+ unmute</execute>