diff --git a/docs/releasenotes/v02-00-03.md b/docs/releasenotes/v02-00-03.md
new file mode 100644
index 00000000..ab970763
--- /dev/null
+++ b/docs/releasenotes/v02-00-03.md
@@ -0,0 +1,10 @@
+---
+layout: page
+title: Release Notes v2.0.3
+---
+
+## Fixes
+- Add on/off capability for virtual thermostats
+
+## Docs
+Compatibility with Homey 3.0 SDK
diff --git a/src/app.json b/src/app.json
index e582db6b..f1890c29 100644
--- a/src/app.json
+++ b/src/app.json
@@ -365,7 +365,8 @@
       "capabilities": [
         "target_temperature",
         "thermostat_override",
-        "measure_temperature"
+        "measure_temperature",
+        "onoff"
       ],
       "pair": [
         {
diff --git a/src/app/services/homey-api/declarations.ts b/src/app/services/homey-api/declarations.ts
index e2af9ada..454f67b9 100644
--- a/src/app/services/homey-api/declarations.ts
+++ b/src/app/services/homey-api/declarations.ts
@@ -4,6 +4,7 @@ export enum CapabilityType {
 
     // Can not be called mode as this is a standard capability
     ThermostatOverride = "thermostat_override",
+    OnOff = "onoff",
 }
 
 export const CLASS_THERMOSTAT: string = "thermostat";
diff --git a/src/drivers/virtual-thermostat/device.ts b/src/drivers/virtual-thermostat/device.ts
index ce97ee6c..cf979e38 100644
--- a/src/drivers/virtual-thermostat/device.ts
+++ b/src/drivers/virtual-thermostat/device.ts
@@ -59,6 +59,9 @@ class VirtualThermostat extends Device implements IVirtualThermostat {
         this.tryRegisterCapability(CapabilityType.ThermostatOverride,
             AsyncDebounce(this.onThermostatModeChanged.bind(this), settings.get<number>(InternalSettings.DriverDebounce, 5 * 1000)));
 
+        this.tryRegisterCapability(CapabilityType.OnOff,
+            AsyncDebounce(this.onOnOff.bind(this), settings.get<number>(InternalSettings.DriverDebounce, 5 * 1000)));
+
         this.repositoryChanged = this.plansChanged.bind(this);
         this.capabilitiesChanged = this.capabilititesChanged.bind(this);
         this.plansApplied = this.scheduleChanged.bind(this);
@@ -72,6 +75,7 @@ class VirtualThermostat extends Device implements IVirtualThermostat {
         this.plan = await this.repository.find(this.id);
         await this.updateCapabilitiesFromPlan();
         await this.updateTemperature();
+        await this.updateOnOffStatus();
     }
 
     @trycatchlog(true)
@@ -110,6 +114,7 @@ class VirtualThermostat extends Device implements IVirtualThermostat {
             // must be processed, we don't care
             await this.updateCapabilitiesFromPlan();
             await this.updateTemperature();
+            await this.updateOnOffStatus();
         }));
     }
 
@@ -337,6 +342,31 @@ class VirtualThermostat extends Device implements IVirtualThermostat {
             this.logger.debug(`we don't have associated devices`);
         }
     }
+
+    /**
+     * React to a thermostat onoff.
+     *
+     * @param value boolean
+     * @param opts unused
+     */
+    @trycatchlog(true)
+    private async onOnOff(value: boolean, _opts: any) {
+        if (this.plan == null) { return; } // should not happen unavailable
+        this.logger.information(`${CapabilityType.OnOff} ${value}`);
+
+        this.plan.enabled = value;
+        await this.repository.update(this.plan);
+    }
+
+    /**
+     * Update this device's state
+     */
+    private async updateOnOffStatus() {
+        if (this.plan == null) { return; }
+
+        this.logger.debug(`Updating ${CapabilityType.OnOff} ${this.plan.enabled}`);
+        await this.doSetCapabilityValue(CapabilityType.OnOff, this.plan.enabled);
+    }
 }
 
 module.exports = VirtualThermostat;
diff --git a/src/drivers/virtual-thermostat/driver.ts b/src/drivers/virtual-thermostat/driver.ts
index 741903ec..13a8e0e5 100644
--- a/src/drivers/virtual-thermostat/driver.ts
+++ b/src/drivers/virtual-thermostat/driver.ts
@@ -36,6 +36,7 @@ class VirtualThermostatsDriver extends Driver {
                     CapabilityType.TargetTemperature,
                     CapabilityType.MeasureTemperature,
                     CapabilityType.ThermostatOverride,
+                    CapabilityType.OnOff,
                 ],
             };
         });