diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9513e70..4d936ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2872,7 +2872,7 @@
 
 * `dart:web_audio`
 
-  * new method on `AudioContext` – `createIirFilter` returns a new class
+  * new method on `AudioContext` – `createIirFilter` returns a new class
     `IirFilterNode`.
 
 * `dart:web_gl`
diff --git a/tools/VERSION b/tools/VERSION
index b140be9..41b44a4 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -29,11 +29,11 @@
 #  * Deprecating an old ABI version:
 #     - increase OLDEST_SUPPORTED_ABI_VERSION to the version that is supported.
 #
-CHANNEL be
+CHANNEL dev
 MAJOR 2
 MINOR 8
 PATCH 0
-PRERELEASE 0
+PRERELEASE 20
 PRERELEASE_PATCH 0
 ABI_VERSION 32
 OLDEST_SUPPORTED_ABI_VERSION 32