diff --git a/Cargo.toml b/Cargo.toml
index 8295022..4965ad5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ license = "MIT"
 url = "2.4.1"
 regex = "1.10.5"
 serde = { version = "1.0.127", features = ["derive"] }
-unic-ucd-ident = { version = "0.9.0", features = ["id"] }
+unicode-id-start = "1"
 
 [dev-dependencies]
 serde_json = "1.0.66"
diff --git a/src/lib.rs b/src/lib.rs
index 7a73226..ff24aaf 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1047,4 +1047,20 @@ mod tests {
     .unwrap();
     assert!(pattern.has_regexp_groups());
   }
+
+  #[test]
+  fn issue54() {
+    let pattern = <UrlPattern>::parse(
+      UrlPatternInit {
+        pathname: Some("/:thereisa\u{30FB}middledot.".to_owned()),
+        ..Default::default()
+      },
+      Default::default(),
+    )
+    .unwrap();
+    assert_eq!(
+      pattern.pathname.group_name_list,
+      vec!["thereisa\u{30FB}middledot"]
+    );
+  }
 }
diff --git a/src/tokenizer.rs b/src/tokenizer.rs
index dd25cfb..c15c22e 100644
--- a/src/tokenizer.rs
+++ b/src/tokenizer.rs
@@ -319,9 +319,9 @@ pub fn tokenize(
 #[inline]
 pub(crate) fn is_valid_name_codepoint(code_point: char, first: bool) -> bool {
   if first {
-    unic_ucd_ident::is_id_start(code_point) || matches!(code_point, '$' | '_')
+    unicode_id_start::is_id_start(code_point) || matches!(code_point, '$' | '_')
   } else {
-    unic_ucd_ident::is_id_continue(code_point)
+    unicode_id_start::is_id_continue(code_point)
       || matches!(code_point, '$' | '\u{200C}' | '\u{200D}')
   }
 }