diff --git a/changelog.mdx b/changelog.mdx
index cd5f7d52..ab8fa68c 100644
--- a/changelog.mdx
+++ b/changelog.mdx
@@ -4,6 +4,12 @@ description: "Latest updates and improvements across bunny.net products."
 rss: true
 ---
 
+<Update label="2026-08-06" tags={["Stream","(Improvement)"]}>
+  ## Stream API v1.5.13
+
+  The Stream API added structured error responses to several endpoints. Fetch Video now returns 422 when the origin file cannot be retrieved and 429 when too many fetch jobs are queued. Set Thumbnail returns 400 for invalid requests and 422 for origin fetch failures. Caption upload responses now include validation details via a structured result type. The resolution cleanup endpoint gained `allResolutions` and `outputs` parameters for finer control over which encoded outputs (HLS, MP4, or all) to remove. [Learn more](/stream/http-api)
+</Update>
+
 <Update label="2026-07-31" tags={["CDN","(New)"]}>
   ## IP Family Policy for Pull Zones
 
diff --git a/stream/changelog.mdx b/stream/changelog.mdx
index 4052afad..e615752a 100644
--- a/stream/changelog.mdx
+++ b/stream/changelog.mdx
@@ -4,6 +4,12 @@ description: "Latest updates and improvements to Stream."
 rss: true
 ---
 
+<Update label="2026-08-06" tags={["Stream","(Improvement)"]}>
+  ## Stream API v1.5.13
+
+  The Stream API added structured error responses to several endpoints. Fetch Video now returns 422 when the origin file cannot be retrieved and 429 when too many fetch jobs are queued. Set Thumbnail returns 400 for invalid requests and 422 for origin fetch failures. Caption upload responses now include validation details via a structured result type. The resolution cleanup endpoint gained `allResolutions` and `outputs` parameters for finer control over which encoded outputs (HLS, MP4, or all) to remove. [Learn more](/stream/http-api)
+</Update>
+
 <Update label="2026-07-16" tags={["Stream","(Improvement)"]}>
   ## Bunny Player extended Chromecast support
 
@@ -106,4 +112,4 @@ rss: true
   ## Smart Chapters
 
   Automatically generate chapters for your videos using AI. Smart Chapters analyzes your video's caption track to create chapter markers, improving navigation for viewers. [Learn more](/stream/smart-chapters)
-</Update>
\ No newline at end of file
+</Update>