diff --git a/submodules/substitution-matrices b/submodules/substitution-matrices
index 3f2448e..871ec1b 160000
--- a/submodules/substitution-matrices
+++ b/submodules/substitution-matrices
@@ -1 +1 @@
-Subproject commit 3f2448e0b1d76906e37cd3b1af618aab255b4f1a
+Subproject commit 871ec1b3cfedd8350317078345732ed31bf8e40e