diff --git a/CHANGELOG.md b/CHANGELOG.md
index 250ca95..0b5f34b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 ### Added
 
+ * Add `serde` feature
+
 ### Removed
 
 ### Changed
diff --git a/Cargo.toml b/Cargo.toml
index 94d7bfa..8f88a65 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,5 +16,7 @@ name = "evalexpr"
 path = "src/lib.rs"
 
 [dependencies]
+serde = { version = "1", optional = true}
 
 [features]
+#serde = ["serde"]
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 7df69be..045f373 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -239,7 +239,8 @@
 
 #![warn(missing_docs)]
 
-extern crate core;
+#[cfg(serde)]
+extern crate serde;
 
 mod configuration;
 pub mod error;
@@ -249,6 +250,8 @@ mod operator;
 mod token;
 mod tree;
 mod value;
+#[cfg(serde)]
+mod serde;
 
 // Exports
 
diff --git a/src/serde/mod.rs b/src/serde/mod.rs
new file mode 100644
index 0000000..e69de29