diff --git a/spec_tests/hed-specification b/spec_tests/hed-specification
index abc9923b..f633de5b 160000
--- a/spec_tests/hed-specification
+++ b/spec_tests/hed-specification
@@ -1 +1 @@
-Subproject commit abc9923b0e0a7e869b73a90c60a7f3f4d8ffe2a1
+Subproject commit f633de5b3209f00f1b4aa94e6342d7a2ba3a5572