diff --git a/.gitmodules b/.gitmodules
index af24b888f0..b10584b689 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,7 +19,7 @@
 [submodule "3party/boost"]
   path = 3party/boost
   url = https://github.com/boostorg/boost.git
-  branch = boost-1.68.0
+  branch = boost-1.75.0
   ignore = dirty
 [submodule "3party/just_gtfs"]
   path = 3party/just_gtfs