diff --git a/Cargo.lock b/Cargo.lock
index 479f657..f1bfce1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -70,7 +70,7 @@ checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
 [[package]]
 name = "eval-stack"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "anyhow",
  "libc",
diff --git a/src/compile.rs b/src/compile.rs
index 59404b1..7c1bbca 100644
--- a/src/compile.rs
+++ b/src/compile.rs
@@ -8,6 +8,7 @@ use anyhow::Result;
 use tokio::process::Command;
 
 #[derive(Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum Language {
     C,
     CPP,