diff --git a/crates/utils/src/codename.rs b/crates/utils/src/codename.rs
index e2e8381..1c0e575 100644
--- a/crates/utils/src/codename.rs
+++ b/crates/utils/src/codename.rs
@@ -1,19 +1,25 @@
+use std::collections::HashMap;
+
 use crate::VERSION;
 
 /// https://github.com/importantimport/hatsu/milestones
 pub fn codename() -> &'static str {
-    match String::from(VERSION) {
-        v if v.starts_with("0.1") => "01_ballade",
-        v if v.starts_with("0.2") => "celluloid",
-        v if v.starts_with("0.3") => "Strobe Nights",
-        v if v.starts_with("0.4") => "Clover Club",
-        v if v.starts_with("0.5") => "Sakura No Kisetsu",
-        v if v.starts_with("0.6") => "World Is Mine",
-        v if v.starts_with("0.7") => "Nisoku Hokou",
-        v if v.starts_with("0.8") => "Sweet Devil",
-        v if v.starts_with("0.9") => "Unfragment",
-        v if v.starts_with("1.0") => "Hoshi No Kakera",
-        // easter egg
-        _ => "Cat Food",
-    }
+    let version = String::from(VERSION);
+    let hashmap: HashMap<&str, &str> = HashMap::from([
+        ("0.1", "01_ballade"),
+        ("0.2", "celluloid"),
+        ("0.3", "Strobe Nights"),
+        ("0.4", "Clover Club"),
+        ("0.5", "Sakura No Kisetsu"),
+        ("0.6", "World Is Mine"),
+        ("0.7", "Nisoku Hokou"),
+        ("0.8", "Sweet Devil"),
+        ("0.9", "Unfragment"),
+        ("1.0", "Hoshi No Kakera"),
+    ]);
+
+    hashmap
+        .iter()
+        .find(|(major_minor, _)| version.starts_with(*major_minor))
+        .map_or("Cat Food", |(_, codename)| codename)
 }