diff --git a/power_widget.lua b/power_widget.lua
index af16998..0a7fd6a 100644
--- a/power_widget.lua
+++ b/power_widget.lua
@@ -55,11 +55,16 @@ function widget:update()
     self.tooltip:set_text(
       percentage .. "%" .. " - " .. self.device.state.name)
 
-    if (
-        percentage <= self.critical_percentage
-        or warning_level == WarningLevel.Low
-        or warning_level == WarningLevel.Critical
-    ) then
+    local should_warn = (
+      self.device.state == power.enums.BatteryState.Discharging and
+        (
+          percentage <= self.critical_percentage
+            or warning_level == WarningLevel.Low
+            or warning_level == WarningLevel.Critical
+        )
+                        )
+
+    if should_warn then
       local msg = (warning_level.name == "None" and "Low" or warning_level.name) .. " battery!"
       naughty.notify({
           preset = naughty.config.presets.critical,
diff --git a/rockspec/power_widget-0.3.5-1.rockspec b/rockspec/power_widget-0.3.5-1.rockspec
new file mode 100644
index 0000000..252f665
--- /dev/null
+++ b/rockspec/power_widget-0.3.5-1.rockspec
@@ -0,0 +1,27 @@
+package = "power_widget"
+version = "0.3.5-1"
+source = {
+   url = "git://github.com/stefano-m/awesome-power_widget",
+   tag = "v0.3.5"
+}
+description = {
+   summary = "A Power widget for the Awesome Window Manager",
+   detailed = [[
+    Monitor your power devices in Awesome with UPower and DBus.
+    ]],
+   homepage = "https://github.com/stefano-m/awesome-power_widget",
+   license = "GPL v3"
+}
+supported_platforms = {
+   "linux"
+}
+dependencies = {
+   "lua >= 5.1",
+   "upower_dbus >= 0.3.0, < 0.4"
+}
+build = {
+   type = "builtin",
+   modules = {
+      power_widget = "power_widget.lua"
+   }
+}