diff --git a/spec_tests/hed-specification b/spec_tests/hed-specification
index 2b727a84..9a1574ec 160000
--- a/spec_tests/hed-specification
+++ b/spec_tests/hed-specification
@@ -1 +1 @@
-Subproject commit 2b727a8410c81b72a0e12846594f2cfc0f7f34fe
+Subproject commit 9a1574ec863dafccf85209238d290e16f6a1047d