diff --git a/third_party/astrolabe b/third_party/astrolabe
index 2fc6c7da..9c647c19 160000
--- a/third_party/astrolabe
+++ b/third_party/astrolabe
@@ -1 +1 @@
-Subproject commit 2fc6c7da9f5ce37ba4a14cd145309789c394add9
+Subproject commit 9c647c197d9bbeb6a8d98b93cda59f256f0a5547