diff --git a/Cargo.toml b/Cargo.toml
index 5a15b32..85df296 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ according to Unicode Technical Standard #39 rules.
 exclude = [ "target/*", "Cargo.lock" ]
 
 [dependencies]
-unicode-script = { version = "0.4.0", default-features = false }
+unicode-script = { version = "0.5.1", default-features = false }
 unicode-normalization = { version = "0.1.12", default-features = false }
 std = { version = "1.0", package = "rustc-std-workspace-std", optional = true }
 core = { version = "1.0", package = "rustc-std-workspace-core", optional = true }
diff --git a/src/mixed_script.rs b/src/mixed_script.rs
index 52157fd..a1c6df1 100644
--- a/src/mixed_script.rs
+++ b/src/mixed_script.rs
@@ -1,11 +1,12 @@
 //! [Mixed-script detection](https://www.unicode.org/reports/tr39/#Mixed_Script_Detection)
 
+use core::fmt::{self, Debug};
 use unicode_script::{Script, ScriptExtension};
 
 /// An Augmented script set, as defined by UTS 39
 ///
 /// https://www.unicode.org/reports/tr39/#def-augmented-script-set
-#[derive(Copy, Clone, PartialEq, Debug, Hash, Eq)]
+#[derive(Copy, Clone, PartialEq, Hash, Eq)]
 pub struct AugmentedScriptSet {
     /// The base ScriptExtension value
     pub base: ScriptExtension,
@@ -23,10 +24,7 @@ impl From<ScriptExtension> for AugmentedScriptSet {
         let mut jpan = false;
         let mut kore = false;
 
-        if ext == ScriptExtension::Single(Script::Common)
-            || ext == ScriptExtension::Single(Script::Inherited)
-            || ext.contains_script(Script::Han)
-        {
+        if ext.is_common() || ext.is_inherited() || ext.contains_script(Script::Han) {
             hanb = true;
             jpan = true;
             kore = true;
@@ -67,7 +65,7 @@ impl From<&'_ str> for AugmentedScriptSet {
 impl Default for AugmentedScriptSet {
     fn default() -> Self {
         AugmentedScriptSet {
-            base: ScriptExtension::Single(Script::Common),
+            base: Script::Common.into(),
             hanb: true,
             jpan: true,
             kore: true,
@@ -75,6 +73,38 @@ impl Default for AugmentedScriptSet {
     }
 }
 
+impl Debug for AugmentedScriptSet {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if self.is_empty() {
+            write!(f, "AugmentedScriptSet {{∅}}")?;
+        } else if self.is_all() {
+            write!(f, "AugmentedScriptSet {{ALL}}")?;
+        } else {
+            write!(f, "AugmentedScriptSet {{")?;
+            let mut first_entry = true;
+            let hanb = if self.hanb { Some("Hanb") } else { None };
+            let jpan = if self.jpan { Some("Jpan") } else { None };
+            let kore = if self.kore { Some("Kore") } else { None };
+            for writing_system in None
+                .into_iter()
+                .chain(hanb)
+                .chain(jpan)
+                .chain(kore)
+                .chain(self.base.iter().map(Script::short_name))
+            {
+                if !first_entry {
+                    write!(f, ", ")?;
+                } else {
+                    first_entry = false;
+                }
+                write!(f, "{}", writing_system)?;
+            }
+            write!(f, "}}")?;
+        }
+        Ok(())
+    }
+}
+
 impl AugmentedScriptSet {
     /// Intersect this set with another
     pub fn intersect_with(&mut self, other: Self) {
@@ -91,8 +121,7 @@ impl AugmentedScriptSet {
 
     /// Check if the set is "All" (Common or Inherited)
     pub fn is_all(&self) -> bool {
-        self.base == ScriptExtension::Single(Script::Common)
-            || self.base == ScriptExtension::Single(Script::Inherited)
+        self.base.is_common() || self.base.is_inherited()
     }
 
     /// Construct an AugmentedScriptSet for a given character
diff --git a/src/restriction_level.rs b/src/restriction_level.rs
index 292a4fa..adaf074 100644
--- a/src/restriction_level.rs
+++ b/src/restriction_level.rs
@@ -3,7 +3,7 @@
 
 use crate::mixed_script::AugmentedScriptSet;
 use crate::GeneralSecurityProfile;
-use unicode_script::{Script, ScriptExtension};
+use unicode_script::Script;
 
 #[derive(Copy, Clone, PartialEq, PartialOrd, Eq, Ord, Debug, Hash)]
 /// The [Restriction level](https://www.unicode.org/reports/tr39/#Restriction_Level_Detection)
@@ -64,7 +64,8 @@ impl RestrictionLevelDetection for &'_ str {
             return RestrictionLevel::SingleScript;
         } else if exclude_latin_set.kore || exclude_latin_set.hanb || exclude_latin_set.jpan {
             return RestrictionLevel::HighlyRestrictive;
-        } else if let ScriptExtension::Single(script) = exclude_latin_set.base {
+        } else if exclude_latin_set.base.len() == 1 {
+            let script = exclude_latin_set.base.iter().next().unwrap();
             if script.is_recommended() && script != Script::Cyrillic && script != Script::Greek {
                 return RestrictionLevel::ModeratelyRestrictive;
             }
diff --git a/src/tests.rs b/src/tests.rs
index 1753411..6409113 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -77,3 +77,40 @@ fn test_potential_mixed_script_detection() {
     assert!(is_potential_mixed_script_confusable_char('A'));
     assert!(!is_potential_mixed_script_confusable_char('D'));
 }
+
+#[test]
+fn test_augmented_script_set() {
+    use crate::mixed_script::AugmentedScriptSet;
+    let augmented_script_sets = vec![
+        AugmentedScriptSet::default(),
+        AugmentedScriptSet::from('0'),
+        AugmentedScriptSet::from('a'),
+        AugmentedScriptSet::from('μ'),
+        AugmentedScriptSet::from('汉'),
+        AugmentedScriptSet::from('ひ'),
+        AugmentedScriptSet::from('カ'),
+        AugmentedScriptSet::from('한'),
+        AugmentedScriptSet::from("汉ひ"),
+        AugmentedScriptSet::from("汉a"),
+        AugmentedScriptSet::from("汉μ"),
+        AugmentedScriptSet::from("〆切"),
+    ];
+    let debug_output = vec![
+        "AugmentedScriptSet {ALL}",
+        "AugmentedScriptSet {ALL}",
+        "AugmentedScriptSet {Latn}",
+        "AugmentedScriptSet {Grek}",
+        "AugmentedScriptSet {Hanb, Jpan, Kore, Hani}",
+        "AugmentedScriptSet {Jpan, Hira}",
+        "AugmentedScriptSet {Jpan, Kana}",
+        "AugmentedScriptSet {Kore, Hang}",
+        "AugmentedScriptSet {Jpan}",
+        "AugmentedScriptSet {∅}",
+        "AugmentedScriptSet {∅}",
+        "AugmentedScriptSet {Hanb, Jpan, Kore, Hani}",
+    ];
+
+    for (ss, output) in augmented_script_sets.into_iter().zip(debug_output) {
+        assert_eq!(format!("{:?}", ss), output);
+    }
+}