diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5973ba632..e97f71322 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 1.37.6
+## 1.38.0
 
 * In expanded mode, emit characters in Unicode private-use areas as escape
   sequences rather than literal characters.
@@ -29,6 +29,11 @@
 * Don't crash when an error occurs in a stylesheet loaded via a custom importer
   with a custom URL scheme.
 
+### Dart API
+
+* Add a `SassArgumentList.keywordsWithoutMarking` getter to access the keyword
+  arguments of an argument list without marking them accessed.
+
 ## 1.37.5
 
 * No user-visible changes.
diff --git a/lib/src/value/argument_list.dart b/lib/src/value/argument_list.dart
index 3b909c59d..f9b4b5014 100644
--- a/lib/src/value/argument_list.dart
+++ b/lib/src/value/argument_list.dart
@@ -25,6 +25,13 @@ class SassArgumentList extends SassList {
 
   final Map<String, Value> _keywords;
 
+  /// Returns the same value as [keywords], but doesn't mark them accessed.
+  ///
+  /// Normally, any time [keywords] is accessed it's marked as such, which
+  /// indicates that the caller was allowed to pass keywords to a rest argument.
+  /// This avoids this marking.
+  Map<String, Value> get keywordsWithoutMarking => _keywords;
+
   /// Whether [keywords] has been accessed.
   ///
   /// This is used to determine whether to throw an exception about passing
diff --git a/pkg/sass_api/pubspec.yaml b/pkg/sass_api/pubspec.yaml
index 7c2299e78..46e20201d 100644
--- a/pkg/sass_api/pubspec.yaml
+++ b/pkg/sass_api/pubspec.yaml
@@ -2,7 +2,7 @@ name: sass_api
 # Note: Every time we add a new Sass AST node, we need to bump the *major*
 # version because it's a breaking change for anyone who's implementing the
 # visitor interface(s).
-version: 1.0.0-dev
+version: 1.0.0-beta.3
 description: Additional APIs for Dart Sass.
 homepage: https://github.com/sass/dart-sass
 
@@ -10,7 +10,7 @@ environment:
   sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
-  sass: 1.37.6
+  sass: 1.38.0
 
 dependency_overrides:
   sass: {path: ../..}
diff --git a/pubspec.yaml b/pubspec.yaml
index 7653ca232..8b29fceff 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: sass
-version: 1.37.6-dev
+version: 1.38.0
 description: A Sass implementation in Dart.
 homepage: https://github.com/sass/dart-sass