diff --git a/lib/external/pattern_language b/lib/external/pattern_language
index 8909b964e..c20dac904 160000
--- a/lib/external/pattern_language
+++ b/lib/external/pattern_language
@@ -1 +1 @@
-Subproject commit 8909b964e24e63b37840d469db5746371e295a33
+Subproject commit c20dac904e295517727e7e54fe8433c4e7f58391