diff --git a/src/run.rs b/src/run.rs
index fa0e677..c70d51d 100644
--- a/src/run.rs
+++ b/src/run.rs
@@ -7,7 +7,7 @@ use crate::{
 
 #[derive(Clone)]
 struct Function {
-	name: &'static str,
+	name: String,
 	inner: Rc<dyn Fn(&mut Scope, Vec<Value>) -> Value>,
 }
 
@@ -20,7 +20,7 @@ impl Debug for Function {
 #[derive(Debug, Clone, Default)]
 pub struct Scope {
 	variables: HashMap<String, ValueInner>,
-	functions: HashMap<&'static str, Function>,
+	functions: HashMap<String, Function>,
 }
 
 impl Scope {
@@ -43,11 +43,12 @@ impl Scope {
 
 	pub fn add_fn(
 		&mut self,
-		name: &'static str,
+		name: impl Into<String>,
 		f: impl Fn(&mut Scope, Vec<Value>) -> Value + 'static,
 	) {
+		let name = name.into();
 		self.functions.insert(
-			name,
+			name.clone(),
 			Function {
 				name,
 				inner: Rc::new(f),