diff --git a/api/Cargo.toml b/api/Cargo.toml
index cf872c8..09f7fbd 100644
--- a/api/Cargo.toml
+++ b/api/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "api"
 version = "0.1.0"
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]
diff --git a/ui/Cargo.toml b/ui/Cargo.toml
index 6f89e01..1e95d5d 100644
--- a/ui/Cargo.toml
+++ b/ui/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "ui"
 version = "0.1.0"
-edition = "2021"
+edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [dependencies]