diff --git a/.changeset/nasty-beans-count.md b/.changeset/nasty-beans-count.md
new file mode 100644
index 0000000..df7ff6e
--- /dev/null
+++ b/.changeset/nasty-beans-count.md
@@ -0,0 +1,5 @@
+---
+"@fleet-sdk/serializer": patch
+---
+
+Fix types for nested `SColl[SBytes]` creation.