diff --git a/src/searcher.rs b/src/searcher.rs
index 8281306..6e04ac1 100644
--- a/src/searcher.rs
+++ b/src/searcher.rs
@@ -43,12 +43,12 @@ impl UserData for Searcher {
 /// Like `Searcher`, but with `modules` values encoded as `&'static str`
 /// to facilitate compile-time includes of Fennel source code.
 struct StaticSearcher {
-    modules: HashMap<String, &'static str>,
+    modules: HashMap<&'static str, &'static str>,
     globals: RegistryKey,
 }
 
 impl StaticSearcher {
-    fn new(modules: HashMap<String, &'static str>, globals: RegistryKey) -> Self {
+    fn new(modules: HashMap<&'static str, &'static str>, globals: RegistryKey) -> Self {
         Self { modules, globals }
     }
 }
@@ -56,7 +56,7 @@ impl StaticSearcher {
 impl UserData for StaticSearcher {
     fn add_methods<'lua, M: UserDataMethods<'lua, Self>>(methods: &mut M) {
         methods.add_meta_method(MetaMethod::Call, |lua_ctx, this, name: String| {
-            match this.modules.get(&name) {
+            match this.modules.get(&name as &str) {
                 Some(content) => Ok(Value::Function(
                     lua_ctx
                         .load(content)
@@ -79,7 +79,7 @@ pub trait AddSearcher {
 
     /// Like `add_searcher`, but with Fennel source code encoded as
     /// `&'static str` to facilitate compile-time includes.
-    fn add_static_searcher(&self, modules: HashMap<String, &'static str>) -> Result<()>;
+    fn add_static_searcher(&self, modules: HashMap<&'static str, &'static str>) -> Result<()>;
 }
 
 impl<'a> AddSearcher for Context<'a> {
@@ -93,7 +93,7 @@ impl<'a> AddSearcher for Context<'a> {
             .map_err(|e| e.into())
     }
 
-    fn add_static_searcher(&self, modules: HashMap<String, &'static str>) -> Result<()> {
+    fn add_static_searcher(&self, modules: HashMap<&'static str, &'static str>) -> Result<()> {
         let globals = self.globals();
         let searchers: Table = globals.get::<_, Table>("package")?.get("searchers")?;
         let registry_key = self.create_registry_value(globals)?;
diff --git a/tests/tests.rs b/tests/tests.rs
index 2e5586d..af2a9d2 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -24,7 +24,7 @@ fn add_searcher_works() {
 #[test]
 fn add_static_searcher_works() {
     let lume = read_lume_to_str();
-    let name = "lume".to_string();
+    let name = "lume";
     let mut map = HashMap::new();
     map.insert(name, lume);