diff --git a/src/components/chart/state-history-charts.ts b/src/components/chart/state-history-charts.ts
index 8c57362054..dd68187f30 100644
--- a/src/components/chart/state-history-charts.ts
+++ b/src/components/chart/state-history-charts.ts
@@ -65,7 +65,7 @@ export class StateHistoryCharts extends LitElement {
 
   @property({ type: Boolean, attribute: "up-to-now" }) public upToNow = false;
 
-  @property() public hoursToShow?: number;
+  @property({ type: Number }) public hoursToShow?: number;
 
   @property({ type: Boolean }) public showNames = true;
 
diff --git a/src/components/ha-big-number.ts b/src/components/ha-big-number.ts
index 85a7783c87..48abfe2327 100644
--- a/src/components/ha-big-number.ts
+++ b/src/components/ha-big-number.ts
@@ -7,15 +7,14 @@ import { HomeAssistant } from "../types";
 
 @customElement("ha-big-number")
 export class HaBigNumber extends LitElement {
-  @property() public value!: number;
+  @property({ type: Number }) public value!: number;
 
   @property() public unit?: string;
 
   @property({ attribute: "unit-position" })
   public unitPosition: "top" | "bottom" = "top";
 
-  @property({ attribute: false })
-  public hass?: HomeAssistant;
+  @property({ attribute: false }) public hass?: HomeAssistant;
 
   @property({ attribute: false })
   public formatOptions: Intl.NumberFormatOptions = {};
diff --git a/src/components/ha-labeled-slider.ts b/src/components/ha-labeled-slider.ts
index 9bbf0e9537..1c507a0c66 100644
--- a/src/components/ha-labeled-slider.ts
+++ b/src/components/ha-labeled-slider.ts
@@ -14,11 +14,11 @@ class HaLabeledSlider extends LitElement {
 
   @property({ type: Boolean }) public required = true;
 
-  @property() public min: number = 0;
+  @property({ type: Number }) public min = 0;
 
-  @property() public max: number = 100;
+  @property({ type: Number }) public max = 100;
 
-  @property() public step: number = 1;
+  @property({ type: Number }) public step = 1;
 
   @property() public helper?: string;
 
@@ -26,7 +26,7 @@ class HaLabeledSlider extends LitElement {
 
   @property() public icon?: string;
 
-  @property() public value?: number;
+  @property({ type: Number }) public value?: number;
 
   protected render() {
     return html`
diff --git a/src/components/ha-selector/ha-selector-boolean.ts b/src/components/ha-selector/ha-selector-boolean.ts
index d99f980d8b..0d94d6de7b 100644
--- a/src/components/ha-selector/ha-selector-boolean.ts
+++ b/src/components/ha-selector/ha-selector-boolean.ts
@@ -10,7 +10,7 @@ import "../ha-input-helper-text";
 export class HaBooleanSelector extends LitElement {
   @property() public hass!: HomeAssistant;
 
-  @property() public value?: number;
+  @property({ type: Boolean }) public value = false;
 
   @property() public label?: string;
 
diff --git a/src/components/ha-selector/ha-selector-number.ts b/src/components/ha-selector/ha-selector-number.ts
index 1d4d2b98d4..672e9f8a52 100644
--- a/src/components/ha-selector/ha-selector-number.ts
+++ b/src/components/ha-selector/ha-selector-number.ts
@@ -14,9 +14,9 @@ export class HaNumberSelector extends LitElement {
 
   @property() public selector!: NumberSelector;
 
-  @property() public value?: number;
+  @property({ type: Number }) public value?: number;
 
-  @property() public placeholder?: number;
+  @property({ type: Number }) public placeholder?: number;
 
   @property() public label?: string;
 
diff --git a/src/state-summary/state-card-timer.ts b/src/state-summary/state-card-timer.ts
index 2279d20cd8..d746ba860c 100644
--- a/src/state-summary/state-card-timer.ts
+++ b/src/state-summary/state-card-timer.ts
@@ -21,7 +21,7 @@ class StateCardTimer extends LitElement {
 
   @property({ type: Boolean }) public inDialog = false;
 
-  @property() public timeRemaining?: number;
+  @property({ type: Number }) public timeRemaining?: number;
 
   private _updateRemaining: any;