diff --git a/channels/fast-4.5.yaml b/channels/fast-4.5.yaml
index 24a651516..5f9dc237c 100644
--- a/channels/fast-4.5.yaml
+++ b/channels/fast-4.5.yaml
@@ -46,3 +46,5 @@ versions:
 - 4.5.19
 
 - 4.5.20
+
+- 4.5.21
diff --git a/channels/fast-4.6.yaml b/channels/fast-4.6.yaml
index 6d90fd742..9623c3216 100644
--- a/channels/fast-4.6.yaml
+++ b/channels/fast-4.6.yaml
@@ -1,5 +1,7 @@
 name: fast-4.6
 versions:
+- 4.5.21
+
 - 4.5.20
 
 - 4.5.19