diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4154b405..2a934efe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 - [ ] Preview window (#6)
 - [ ] File globbing pattern support (#49)
 - [ ] Add minification default settings
+- [x] Support for the old Sass syntax and `.sass` files
 
 Features that have a checkmark are complete and available for
 download in the
diff --git a/src/WebCompiler/Compile/CompilerService.cs b/src/WebCompiler/Compile/CompilerService.cs
index 8e1c1cd2..a78e210c 100644
--- a/src/WebCompiler/Compile/CompilerService.cs
+++ b/src/WebCompiler/Compile/CompilerService.cs
@@ -11,7 +11,7 @@ namespace WebCompiler
     public static class CompilerService
     {
         internal const string Version = "1.4.166";
-        private static readonly string[] _allowed = new[] { ".LESS", ".SCSS", ".COFFEE", ".ICED", ".JS", ".JSX", ".ES6" };
+        private static readonly string[] _allowed = new[] { ".LESS", ".SCSS", ".SASS", ".COFFEE", ".ICED", ".JS", ".JSX", ".ES6" };
         private static readonly string _path = Path.Combine(Path.GetTempPath(), "WebCompiler" + Version);
         private static object _syncRoot = new object(); // Used to lock on the initialize step
 
@@ -44,6 +44,7 @@ internal static ICompiler GetCompiler(Config config)
                     break;
 
                 case ".SCSS":
+                case ".SASS":
                     compiler = new SassCompiler(_path);
                     break;
 
diff --git a/src/WebCompilerVsix/JSON/compilerconfig-schema.json b/src/WebCompilerVsix/JSON/compilerconfig-schema.json
index d611a805..0d599a84 100644
--- a/src/WebCompilerVsix/JSON/compilerconfig-schema.json
+++ b/src/WebCompilerVsix/JSON/compilerconfig-schema.json
@@ -22,7 +22,7 @@
     "sassOptions": {
       "properties": {
         "inputFile": {
-          "pattern": "\\.scss$"
+          "pattern": "\\.(scss|sass)$"
         },
         "options": {
           "$ref": "compilerdefaults-schema.json#/definitions/sass"
diff --git a/src/WebCompilerVsix/registry.pkgdef b/src/WebCompilerVsix/registry.pkgdef
index d36a713e..23bff2ab 100644
--- a/src/WebCompilerVsix/registry.pkgdef
+++ b/src/WebCompilerVsix/registry.pkgdef
@@ -10,4 +10,7 @@
 "DefaultIconMoniker"="KnownMonikers.Binding"
 
 [$RootKey$\ShellFileAssociations\.defaults]
-"DefaultIconMoniker"="KnownMonikers.SettingsFile"
\ No newline at end of file
+"DefaultIconMoniker"="KnownMonikers.SettingsFile"
+
+[$RootKey$\ShellFileAssociations\.sass]
+"DefaultIconMoniker"="KnownMonikers.SASSStyleSheet"
\ No newline at end of file