diff --git a/CHANGELOG b/CHANGELOG
index 535bbaff..19dfa4da 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -3,6 +3,7 @@ jc changelog
 20220202 v1.18.3
 - Add rsync command and log file parser tested on linux and macOS
 - Add rsync command and log file streaming parser tested on linux and macOS
+- Enhance timestamp performance with caching and format hints
 - Refactor ignore_exceptions functionality in streaming parsers
 
 20220127 v1.18.2
diff --git a/jc/utils.py b/jc/utils.py
index 916ba530..6986963d 100644
--- a/jc/utils.py
+++ b/jc/utils.py
@@ -258,7 +258,7 @@ class timestamp:
         self.utc = dt['timestamp_utc']
 
     def __repr__(self):
-        return f'timestamp(string="{self.string}", format={self.format}, naive={self.naive}, utc={self.utc})'
+        return f'timestamp(string={self.string!r}, format={self.format}, naive={self.naive}, utc={self.utc})'
 
     def _parse(self):
         """