diff --git a/server/services/parsing/iso8601.ts b/server/services/parsing/iso8601.ts
index 32fe3782e..de04a7bbb 100644
--- a/server/services/parsing/iso8601.ts
+++ b/server/services/parsing/iso8601.ts
@@ -3,12 +3,12 @@
  * Examples: PT40M25S
  */
 export function parseIso8601Duration(duration: string): number {
-	let match = /P(\d+D)?(?:T(\d+H)?(\d+M)?(\d+S)?)?/
+	let match = /P(\d+D)?(?:T(\d+H)?(\d+M)?([\d.]+S)?)?/
 		.exec(duration)
 		?.slice(1)
 		.map(x => {
 			if (x !== null && x !== undefined) {
-				return x.replace(/\D/, "");
+				return x.replace(/[^\d.]/, "");
 			}
 		});
 
@@ -19,7 +19,7 @@ export function parseIso8601Duration(duration: string): number {
 	const days = parseInt(match[0] ?? "0", 10) || 0;
 	const hours = parseInt(match[1] ?? "0", 10) || 0;
 	const minutes = parseInt(match[2] ?? "0", 10) || 0;
-	const seconds = parseInt(match[3] ?? "0", 10) || 0;
+	const seconds = parseFloat(match[3] ?? "0") || 0;
 
 	return days * (24 * 3600) + hours * 3600 + minutes * 60 + seconds;
 }
diff --git a/server/tests/unit/services/parsing/iso8601.spec.ts b/server/tests/unit/services/parsing/iso8601.spec.ts
index f75518fc0..4aef01d35 100644
--- a/server/tests/unit/services/parsing/iso8601.spec.ts
+++ b/server/tests/unit/services/parsing/iso8601.spec.ts
@@ -3,6 +3,8 @@ import { parseIso8601Duration } from "../../../../services/parsing/iso8601";
 describe("parse iso8601 duration", () => {
 	it.each([
 		["PT10S", 10],
+		["PT10.0S", 10],
+		["PT10.000S", 10],
 		["PT5M", 5 * 60],
 		["PT40M25S", 40 * 60 + 25],
 		["PT1H", 1 * 60 * 60],