diff --git a/spec_tests/hed-specification b/spec_tests/hed-specification
index 23dfb193..a9bf8b5f 160000
--- a/spec_tests/hed-specification
+++ b/spec_tests/hed-specification
@@ -1 +1 @@
-Subproject commit 23dfb1935570eae02a45ddc77505926b652036b8
+Subproject commit a9bf8b5f01101ddf3fc7721206e67273bda84096