diff --git a/src/cppgtfs b/src/cppgtfs
index 77424d4..520be35 160000
--- a/src/cppgtfs
+++ b/src/cppgtfs
@@ -1 +1 @@
-Subproject commit 77424d491a7906172da3d0e0a58a84f9d9320882
+Subproject commit 520be35426083e96e6adc0d1a7915c9640b1f4e3