diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4da2fdb1..6be4a27f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.37.3
+
+* No user-visible changes.
+
 ## 1.37.2
 
 * No user-visible changes.
diff --git a/pkg/sass_api/pubspec.yaml b/pkg/sass_api/pubspec.yaml
index 4e754775..4eb81682 100644
--- a/pkg/sass_api/pubspec.yaml
+++ b/pkg/sass_api/pubspec.yaml
@@ -10,7 +10,7 @@ environment:
   sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
-  sass: 1.37.2
+  sass: 1.37.3
 
 dependency_overrides:
   sass: {path: ../..}
diff --git a/pubspec.yaml b/pubspec.yaml
index 85181b45..e6cd6bd2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: sass
-version: 1.37.2
+version: 1.37.3
 description: A Sass implementation in Dart.
 homepage: https://github.com/sass/dart-sass
 
diff --git a/tool/grind/subpackages.dart b/tool/grind/subpackages.dart
index 15b137e2..87366813 100644
--- a/tool/grind/subpackages.dart
+++ b/tool/grind/subpackages.dart
@@ -51,13 +51,13 @@ Future<void> deploySubPackages() async {
   var client = http.Client();
   for (var package in Directory("pkg").listSync().map((dir) => dir.path)) {
     var pubspecPath = "$package/pubspec.yaml";
-    var pubspec = Pubspec.parse(
-        File(pubspecPath).readAsStringSync(),
+    var pubspec = Pubspec.parse(File(pubspecPath).readAsStringSync(),
         sourceUrl: p.toUri(pubspecPath));
 
     // Remove the dependency override on `sass`, because otherwise it will block
     // publishing.
-    var pubspecYaml = loadYaml(File(pubspecPath).readAsStringSync());
+    var pubspecYaml = Map<dynamic, dynamic>.of(
+        loadYaml(File(pubspecPath).readAsStringSync()) as YamlMap);
     pubspecYaml.remove("dependency_overrides");
     File(pubspecPath).writeAsStringSync(json.encode(pubspecYaml));