diff --git a/aws-encryption-sdk-specification b/aws-encryption-sdk-specification
index c35fbd91b..66da9f33e 160000
--- a/aws-encryption-sdk-specification
+++ b/aws-encryption-sdk-specification
@@ -1 +1 @@
-Subproject commit c35fbd91b28303d69813119088c44b5006395eb4
+Subproject commit 66da9f33e1482c17cd891090fec4385051f15633