diff --git a/README.md b/README.md
index e8e0b80f..a5b4713e 100644
--- a/README.md
+++ b/README.md
@@ -141,10 +141,10 @@ This action starts immediately but ignores the job missing in the first 5 minute
 - No need to extend `wait-seconds-before-first-polling`
 - Disable `optional`, because it is needed to check
 - Set enough value for `startupGracePeriod` for this purpose.\
-  It should be parsible with [Temporal.Duration.from()](https://github.com/tc39/proposal-temporal)\
+  It should be parsible with [TC39 - Temporal.Duration](https://github.com/tc39/proposal-temporal/blob/26e4cebe3c49f56932c1d5064fec9993e981823a/docs/duration.md)\
   e.g
-  - `"PT1M"` # ISO8601 duration format
-  - `{ "minutes": 3, "seconds": 20 }` # key-value for each unit
+  - `"PT3M42S"` # ISO 8601 duration format
+  - `{ "minutes": 3, "seconds": 42 }` # key-value for each unit
 
 If not using wait-list, this pattern should be considered in your `wait-seconds-before-first-polling`.
 
diff --git a/src/schema.ts b/src/schema.ts
index 7e057611..46bcc971 100644
--- a/src/schema.ts
+++ b/src/schema.ts
@@ -34,6 +34,8 @@ const MyDurationLike = z.object({
 
 type MyDurationLike = z.infer<typeof MyDurationLike>;
 
+// IETF does not define duration formats in their RFCs, but in RFC 3399 refers ISO 8601 duration formats.
+// https://www.ietf.org/rfc/rfc3339.txt
 const Durationable = z.union([z.string().duration(), MyDurationLike]);
 type Dirationable = z.infer<typeof Durationable>;