diff --git a/packages/pretty_logging/lib/pretty_logging.dart b/packages/pretty_logging/lib/pretty_logging.dart
index 30917c6b..bc45c81b 100644
--- a/packages/pretty_logging/lib/pretty_logging.dart
+++ b/packages/pretty_logging/lib/pretty_logging.dart
@@ -8,24 +8,24 @@ import 'package:io/ansi.dart';
 ///
 /// You can also pass a custom [printFunction] or [logColorChooser].
 void prettyLog(LogRecord record,
-    {bool Function(LogRecord) omitError,
-    void Function(String) printFunction,
-    AnsiCode Function(Level) logColorChooser}) {
+    {bool Function(LogRecord)? omitError,
+    void Function(String)? printFunction,
+    AnsiCode Function(Level)? logColorChooser}) {
   logColorChooser ??= chooseLogColor;
   omitError ??= (_) => false;
   printFunction ??= print;
 
   var code = logColorChooser(record.level);
-  if (record.error == null) printFunction(code.wrap(record.toString()));
+  if (record.error == null) printFunction(code.wrap(record.toString())!);
 
   if (record.error != null) {
     var err = record.error;
     if (omitError(record)) return;
-    printFunction(code.wrap(record.toString() + '\n'));
-    printFunction(code.wrap(err.toString()));
+    printFunction(code.wrap(record.toString() + '\n')!);
+    printFunction(code.wrap(err.toString())!);
 
     if (record.stackTrace != null) {
-      printFunction(code.wrap(record.stackTrace.toString()));
+      printFunction(code.wrap(record.stackTrace.toString())!);
     }
   }
 }
diff --git a/packages/pretty_logging/pubspec.yaml b/packages/pretty_logging/pubspec.yaml
index 6a3f7a16..5f693722 100644
--- a/packages/pretty_logging/pubspec.yaml
+++ b/packages/pretty_logging/pubspec.yaml
@@ -1,10 +1,10 @@
 name: pretty_logging
-version: 2.0.0
+version: 2.1.0
 description: Standalone helper for colorful logging output, using pkg:io AnsiCode.
 author: Tobe Osakwe <thosakwe@gmail.com>
 homepage: https://github.com/angel-dart/pretty_logging
 environment:
-  sdk: ">=2.10.0 <3.0.0"
+  sdk: '>=2.12.0 <3.0.0'
 dependencies:
   io: ^1.0.0
   logging: ^1.0.0