diff --git a/CHANGELOG.md b/CHANGELOG.md
index 121a478a..fd88a92c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+## [5.0.0-beta6 - 5.0 Beta, on Mar 15th, 2019](https://github.com/rs/SDWebImage/releases/tag/5.0.0-beta6)
+See [all tickets marked for the 5.0.0-beta6 release](https://github.com/rs/SDWebImage/milestone/30)
+
+#### Fixes
+- Fix the issue that SDWebImagePrefetch in 5.x, will submit all prefetch URLs to manager without any concurrent limit #2631
+- Fix the current transformer cache key generating rules, try to keep the image file extension #2635
+
+#### Project
+- Move some internal classes into private header files, make it easy to maintain the code #2634
+
 ## [4.4.6 - 4.4 patch, on Feb 26th, 2019](https://github.com/SDWebImage/SDWebImage/releases/tag/4.4.6)
 See [all tickets marked for the 4.4.6 release](https://github.com/SDWebImage/SDWebImage/milestone/33)
 
diff --git a/Docs/API-Diff/5.0/apidiff.html b/Docs/API-Diff/5.0/apidiff.html
index ce82699a..0dbd1fd0 100644
--- a/Docs/API-Diff/5.0/apidiff.html
+++ b/Docs/API-Diff/5.0/apidiff.html
@@ -1104,6 +1104,7 @@
 <div class="difference"><span class="status added">Added</span> SDWebImagePrefetchToken</div>
 <div class="difference"><span class="status added">Added</span> -[SDWebImagePrefetchToken cancel]</div>
 <div class="difference"><span class="status added">Added</span> SDWebImagePrefetchToken.urls</div>
+<div class="difference"><span class="status added">Added</span> SDWebImagePrefetcher.maxConcurrentPrefetchCount</div>
 <div class="difference"><span class="status added">Added</span> SDWebImagePrefetcher.context</div>
 <div class="difference"><span class="status added">Added</span> SDWebImagePrefetcher.delegateQueue</div>
 </div>