1 files changed, 1 insertions, 0 deletions
diff --git a/Cargo.toml b/Cargo.toml
index 099f276..2e473bf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,7 @@ keywords = ["syn"]
 categories = ["development-tools::procedural-macro-helpers"]
 readme = "README.md"
 include = ["Cargo.toml", "src/**/*.rs", "tests/**/*.rs", "README.md", "LICENSE-APACHE", "LICENSE-MIT"]
+edition = "2018"
 publish = false # contains breaking changes
 
 [lib]