diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 7c6c345..1741d61 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -6,12 +6,6 @@
 
 == [Unreleased]
 
-== [v0.2.1] - 2022-12-28
-
-=== Fixed
-
-- fix serializing Unicode
-
 == [v0.2.0] - 2022-11-25
 
 === Added
diff --git a/Cargo.toml b/Cargo.toml
index 257207f..b979e20 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "serde_sjson"
-version = "0.2.1"
+version = "0.2.0"
 edition = "2021"
 keywords = ["serde", "serialization", "sjson"]
 description = "An SJSON serialization file format"
diff --git a/src/ser.rs b/src/ser.rs
index a10c566..51c9fd5 100644
--- a/src/ser.rs
+++ b/src/ser.rs
@@ -121,31 +121,48 @@ impl<'a> serde::ser::Serializer for &'a mut Serializer {
 
     fn serialize_str(self, v: &str) -> Result<Self::Ok> {
         self.ensure_top_level_struct()?;
-
         let needs_escapes =
             v.is_empty() || v.contains([' ', '\n', '\r', '\t', '=', '\'', '"', '\\', '/']);
-
         if needs_escapes {
             self.output += "\"";
 
-            for c in v.chars() {
+            let len = v.len();
+            let chars = v.chars();
+            let mut start = 0;
+
+            for (i, c) in chars.enumerate() {
+                if ('\x20'..='\x7e').contains(&c)
+                    && !['\t', '\n', '\r', '\"', '\\', '/'].contains(&c)
+                {
+                    continue;
+                }
+
+                self.output += &v[start..i];
+                self.output.push('\\');
+
                 match c {
                     '\t' => {
-                        self.output.push('\\');
                         self.output.push('t');
                     }
                     '\n' => {
-                        self.output.push('\\');
                         self.output.push('n');
                     }
                     '\r' => {
-                        self.output.push('\\');
                         self.output.push('r');
                     }
+                    '\x7f'.. => {
+                        self.output += &format!("u{:4x}", c as u32);
+                    }
                     c => {
                         self.output.push(c);
                     }
                 };
+
+                start = i + 1;
+            }
+
+            if start < len {
+                self.output += &v[start..];
             }
 
             self.output += "\"";