diff --git a/contracts/light-client/Cargo.toml b/contracts/light-client/Cargo.toml
index 12c95ec..6d6df17 100644
--- a/contracts/light-client/Cargo.toml
+++ b/contracts/light-client/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 authors = ["Dimitris Lamprinos <pkakelas@gmail.com>", "Themis Papameletiou <papameletiou.themis@gmail.com>"]
-edition = "2023"
+edition = "2021"
 name = "light-client"
 version = "0.1.0"
 
diff --git a/types/Cargo.toml b/types/Cargo.toml
index 325ebb8..e167146 100644
--- a/types/Cargo.toml
+++ b/types/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 authors = ["Dimitris Lamprinos <pkakelas@gmail.com>", "Themis Papameletiou <papameletiou.themis@gmail.com>"]
-edition = "2023"
+edition = "2021"
 name = "types"
 version = "0.1.0"