diff --git a/spec_tests/hed-specification b/spec_tests/hed-specification
index a9bf8b5f..38a59932 160000
--- a/spec_tests/hed-specification
+++ b/spec_tests/hed-specification
@@ -1 +1 @@
-Subproject commit a9bf8b5f01101ddf3fc7721206e67273bda84096
+Subproject commit 38a5993234b0b29e6adb8edd4647f9ad33c6eb1f