diff --git a/bootbox/bootbox-tests.ts b/bootbox/bootbox-tests.ts
index 92a079f456..b5f32931ae 100644
--- a/bootbox/bootbox-tests.ts
+++ b/bootbox/bootbox-tests.ts
@@ -6,7 +6,7 @@ bootbox.alert("Are we ok with callback?", function () {
 	console.log("Callback called!");
 });
 bootbox.alert({
-	size: "medium",
+	size: "small",
 	message: "Are we ok with callback and custom button?",
 	callback: function () {
 		console.log("Callback called!");
diff --git a/bootbox/index.d.ts b/bootbox/index.d.ts
index 40494d5ca5..d5ceb5ef62 100644
--- a/bootbox/index.d.ts
+++ b/bootbox/index.d.ts
@@ -15,7 +15,8 @@ interface BootboxBaseOptions {
 	closeButton?: boolean;
 	animate?: boolean;
 	className?: string;
-	size?: string;
+	/** All other values result in medium */
+	size?: "small" | "large";
 	buttons?: BootboxButtonMap; // complex object where each key is of type BootboxButton
 }
 
@@ -40,7 +41,7 @@ interface BootboxConfirmOptions extends BootboxDialogOptions {
 interface BootboxPromptOptions extends BootboxBaseOptions {
 	title: string;
 	value?: string;
-	inputType?: string;
+	inputType?: "text" | "textarea" | "email" | "select" | "checkbox" | "date" | "time" | "number" | "password";
 	callback: (result: string) => any;
 	buttons?: BootboxConfirmPromptButtonMap;
 }