diff --git a/types/bootbox/bootbox-tests.ts b/types/bootbox/bootbox-tests.ts
index f5604d5312..42e1f3da2a 100644
--- a/types/bootbox/bootbox-tests.ts
+++ b/types/bootbox/bootbox-tests.ts
@@ -12,6 +12,26 @@ bootbox.alert({
 		console.log("Callback called!");
 	}
 });
+bootbox.alert({
+	size: "extra-large",
+	message: "Are we ok with new sizes?",
+});
+bootbox.alert({
+	size: "lg",
+	message: "Are we ok with new alternative size keys?",
+});
+bootbox.alert({
+	scrollable: true,
+	message: "Are we ok with scrollable?",
+});
+bootbox.alert({
+	swapButtonOrder: true,
+	message: "Are we ok with swapButtonOrder?",
+});
+bootbox.alert({
+	centerVertical: true,
+	message: "Are we ok with centerVertical?",
+});
 
 bootbox.confirm("Click cancel to pass test", function (result) {
 	console.log(!result);
@@ -38,6 +58,18 @@ bootbox.prompt({
 		console.log(result);
 	}
 });
+bootbox.prompt({
+	size: "xl",
+	title: "Enter 'ok' to pass test", callback: function (result) {
+		console.log(result);
+	}
+});
+bootbox.prompt({
+	scrollable: true,
+	title: "Enter 'ok' to pass test", callback: function (result) {
+		console.log(result);
+	}
+});
 bootbox.prompt({
     title: "This is a prompt with a set of checkbox inputs!",
     inputType: 'checkbox',
diff --git a/types/bootbox/index.d.ts b/types/bootbox/index.d.ts
index dfdf0de871..15498266b3 100644
--- a/types/bootbox/index.d.ts
+++ b/types/bootbox/index.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for Bootbox 4.4.0
+// Type definitions for Bootbox 5.2.0
 // Project: https://github.com/makeusabrew/bootbox
 // Definitions by: Vincent Bortone <https://github.com/vbortone>, Kon Pik <https://github.com/konpikwastaken>, Anup Kattel <https://github.com/kanup>, Dominik Schroeter <https://github.com/icereed>, Troy McKinnon <https://github.com/trodi>, Stanny Nuytkens <https://github.com/stannynuytkens>, Soner Köksal <https://github.com/renjfk>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
@@ -17,13 +17,17 @@ interface BootboxBaseOptions<T = any> {
 	animate?: boolean;
 	className?: string;
 	/** All other values result in medium */
-	size?: "small" | "large";
+	size?: "small" | "sm" |  "large" | "lg" | "extra-large" | "xl";
+	locale?: string;
 	buttons?: BootboxButtonMap; // complex object where each key is of type BootboxButton
+	scrollable?: boolean;
 }
 
 /** Bootbox options available for custom modals */
 interface BootboxDialogOptions<T = any> extends BootboxBaseOptions<T> {
 	message: JQuery|any[]|Element|DocumentFragment|Text|string|((index: number, html: string) => string|Element|JQuery);
+	swapButtonOrder?: boolean;
+	centerVertical?: boolean;
 }
 
 /** Bootbox options available for alert modals */
@@ -42,7 +46,7 @@ interface BootboxConfirmOptions extends BootboxDialogOptions<boolean> {
 interface BootboxPromptOptions extends BootboxBaseOptions<string> {
 	title: string;
 	value?: string;
-	inputType?: "text" | "textarea" | "email" | "select" | "checkbox" | "date" | "time" | "number" | "password";
+	inputType?: "text" | "textarea" | "email" | "select" | "checkbox" | "date" | "time" | "number" | "password" | "radio" | "range";
 	callback: (result: string) => any;
 	buttons?: BootboxConfirmPromptButtonMap;
 	inputOptions?: { text: string, value: string, group?: string }[];