diff --git a/rdfshape-api b/rdfshape-api
index 572b192..6c31f73 160000
--- a/rdfshape-api
+++ b/rdfshape-api
@@ -1 +1 @@
-Subproject commit 572b1921dd4d17c8d565c11f972e17c96fc36e09
+Subproject commit 6c31f73583bf14b53a5ab063ee47a5135a368640