diff --git a/lib/external/pattern_language b/lib/external/pattern_language
index 67540ef3c..ac2931943 160000
--- a/lib/external/pattern_language
+++ b/lib/external/pattern_language
@@ -1 +1 @@
-Subproject commit 67540ef3cbeb8f78fb3427a33f52f52625f08578
+Subproject commit ac2931943d2b7f98622f6f9605a4f416625e8567