diff --git a/pkgs/string_scanner/CHANGELOG.md b/pkgs/string_scanner/CHANGELOG.md
index 2c41c9d..a5d5518 100644
--- a/pkgs/string_scanner/CHANGELOG.md
+++ b/pkgs/string_scanner/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 0.0.3
+
+* Make `StringScannerException` inherit from source_map's
+  [`SpanFormatException`][].
+
+[SpanFormatException]: (http://www.dartdocs.org/documentation/source_maps/0.9.2/index.html#source_maps/source_maps.SpanFormatException)
+
 ## 0.0.2
 
 * `new StringScanner()` now takes an optional `sourceUrl` argument that provides
diff --git a/pkgs/string_scanner/lib/src/exception.dart b/pkgs/string_scanner/lib/src/exception.dart
index c398687..44ec9a3 100644
--- a/pkgs/string_scanner/lib/src/exception.dart
+++ b/pkgs/string_scanner/lib/src/exception.dart
@@ -7,10 +7,7 @@
 import 'package:source_maps/source_maps.dart';
 
 /// An exception thrown by a [StringScanner] that failed to parse a string.
-class StringScannerException implements FormatException {
-  /// The error message.
-  final String message;
-
+class StringScannerException extends SpanFormatException {
   /// The source string being parsed.
   final String string;
 
@@ -19,19 +16,6 @@
   /// This may be `null`, indicating that the source URL is unknown.
   final Uri sourceUrl;
 
-  /// The span within [string] that caused the exception.
-  final Span span;
-
-  StringScannerException(this.message, this.string, this.sourceUrl, this.span);
-
-  /// Returns a detailed description of this exception.
-  ///
-  /// If [useColors] is true, the section of the source that caused the
-  /// exception will be colored using ANSI color codes. By default, it's colored
-  /// red, but a different ANSI code may passed via [color].
-  String toString({bool useColors: false, String color}) {
-    return "Error on " + span.getLocationMessage(
-        message, useColors: useColors, color: color);
-  }
+  StringScannerException(String message, this.string, this.sourceUrl, Span span)
+      : super(message, span);
 }
-
diff --git a/pkgs/string_scanner/pubspec.yaml b/pkgs/string_scanner/pubspec.yaml
index 86ae238..f6d7ab9 100644
--- a/pkgs/string_scanner/pubspec.yaml
+++ b/pkgs/string_scanner/pubspec.yaml
@@ -1,12 +1,12 @@
 name: string_scanner
-version: 0.0.2
+version: 0.0.3
 author: "Dart Team <misc@dartlang.org>"
 homepage: http://www.dartlang.org
 description: >
   A class for parsing strings using a sequence of patterns.
 dependencies:
   path: ">=1.2.0 <2.0.0"
-  source_maps: ">=0.9.0 <0.10.0"
+  source_maps: ">=0.9.2 <0.10.0"
 dev_dependencies:
   unittest: ">=0.10.0 <0.11.0"
 environment: