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-rw-r--r--book/book.toml2
1 files changed, 1 insertions, 1 deletions
diff --git a/book/book.toml b/book/book.toml
index 066f3a62..559b3d1c 100644
--- a/book/book.toml
+++ b/book/book.toml
@@ -4,7 +4,7 @@ authors = ["David Tolnay"]
description = "CXX — safe interop between Rust and C++"
[rust]
-edition = "2018"
+edition = "2021"
[build]
build-dir = "build"