diff --git a/rust/BUILD b/rust/BUILD
index 586e01dac3..bc7700a207 100644
--- a/rust/BUILD
+++ b/rust/BUILD
@@ -103,6 +103,7 @@ rust_library(
 rust_test(
     name = "protobuf_upb_test",
     crate = ":protobuf_upb",
+    edition = "2021",
     rustc_flags = [
         "--cfg=upb_kernel",
         "--cfg=bzl",
diff --git a/rust/protobuf_macros/BUILD b/rust/protobuf_macros/BUILD
index 6183cd362e..e46a674a71 100644
--- a/rust/protobuf_macros/BUILD
+++ b/rust/protobuf_macros/BUILD
@@ -12,6 +12,7 @@ PROC_MACRO_SRCS = ["proto_proc_macro_impl.rs"]
 rust_proc_macro(
     name = "protobuf_macros",
     srcs = PROC_MACRO_SRCS,
+    edition = "2021",
     visibility = [
         "//devtools/rust/rust_analyzer/proc_macros:__pkg__",
         "//rust:__subpackages__",