diff --git a/etc/api/shared.yaml b/etc/api/shared.yaml
index 444f98a7cf..2c40551d6a 100644
--- a/etc/api/shared.yaml
+++ b/etc/api/shared.yaml
@@ -87,7 +87,7 @@ directories:
   # The subdirectory to contain documentation from all APIs and related programs
   doc_subdir: doc
 cargo:
-  build_version: "3.1.0"
+  build_version: "4.0.0"
   repo_base_url: https://github.com/Byron/google-apis-rs
   authors:
     # don't forget to possibly add them to copyright authors