diff --git a/src/module/bm/header.rs b/src/module/bm/header.rs
index 41864650..616fa6f7 100644
--- a/src/module/bm/header.rs
+++ b/src/module/bm/header.rs
@@ -6,11 +6,11 @@ pub fn get_spec() -> FHS {
 }
 
 fn url_key() -> FHS {
-    FHS::Key { name: "URL", value_type: Box::new(FHS::Text) }
+    FHS::Key { name: String::from("URL"), value_type: Box::new(FHS::Text) }
 }
 
 fn tags_key() -> FHS {
-    FHS::Key { name: "TAGS", value_type: Box::new(text_array()) }
+    FHS::Key { name: String::from("TAGS"), value_type: Box::new(text_array()) }
 }
 
 fn text_array() -> FHS {
@@ -22,11 +22,11 @@ pub fn build_header(url: &String, tags: &Vec<String>) -> FHD {
     FHD::Map {
         keys: vec![
             FHD::Key {
-                name: "URL",
+                name: String::from("URL"),
                 value: Box::new(FHD::Text(url.clone()))
             },
             FHD::Key {
-                name: "TAGS",
+                name: String::from("TAGS"),
                 value: Box::new(FHD::Text(tags.connect(",")))
             }
         ]
diff --git a/src/storage/file.rs b/src/storage/file.rs
index 75bc3b8e..aca195c4 100644
--- a/src/storage/file.rs
+++ b/src/storage/file.rs
@@ -16,7 +16,7 @@ pub enum FileHeaderSpec {
     UInteger,
     Float,
     Text,
-    Key { name: &'static str, value_type: Box<FileHeaderSpec> },
+    Key { name: String, value_type: Box<FileHeaderSpec> },
     Map { keys: Vec<FileHeaderSpec> },
     Array { allowed_types: Vec<FileHeaderSpec> },
 }
@@ -30,7 +30,7 @@ pub enum FileHeaderData {
     UInteger(u64),
     Float(f64),
     Text(String),
-    Key { name: &'static str, value: Box<FileHeaderData> },
+    Key { name: String, value: Box<FileHeaderData> },
     Map { keys: Vec<FileHeaderData> },
     Array { values: Box<Vec<FileHeaderData>> },
 }