diff --git a/Cargo.toml b/Cargo.toml
index 1dc052b..9c4be77 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "jsonpath_reference_implementation"
 version = "0.0.1"
 authors = ["Glyn Normington <glyn.normington@gmail.com>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 itertools = "0.9.0"