diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d632398..3ebba76 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,21 +4,23 @@ on:
   pull_request:
 name: Test
 env:
-  SASS_VERSION: 1.63.2
+  SASS_VERSION: 1.77.5
 jobs:
   test:
     strategy:
       matrix:
-        go-version: [~1.19, ~1.20]
+        go-version: [1.21.x, 1.22.x]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
     - name: Install Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v5
       with:
         go-version: ${{ matrix.go-version }}
+    - name: Install staticcheck
+      run: go install honnef.co/go/tools/cmd/staticcheck@latest
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Install dart-sass Linux
       if: matrix.os == 'ubuntu-latest'
       run: |
@@ -38,6 +40,8 @@ jobs:
         curl -LJO "https://github.com/sass/dart-sass/releases/download/${env:SASS_VERSION}/dart-sass-${env:SASS_VERSION}-windows-x64.zip";
         Expand-Archive -Path "dart-sass-${env:SASS_VERSION}-windows-x64.zip" -DestinationPath .;
         echo "DART_SASS_BINARY=$env:GITHUB_WORKSPACE/dart-sass/sass.bat" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf-8 -Append
+    - name: Staticcheck
+      run: staticcheck ./...
     - name: Test
       run: go test -race . -coverprofile=coverage.txt -covermode=atomic
     - name: Upload coverage
diff --git a/conn.go b/conn.go
index 2b6042d..4b4b5a4 100644
--- a/conn.go
+++ b/conn.go
@@ -57,7 +57,6 @@ func (c conn) Start() error {
 
 // Close closes conn's WriteCloser, ReadClosers, and waits for the command to finish.
 func (c conn) Close() error {
-
 	writeErr := c.WriteCloser.Close()
 	readErr := c.readerCloser.Close()
 	var interruptErr error
@@ -106,7 +105,7 @@ func (c conn) waitWithTimeout() error {
 
 		}
 		return err
-	case <-time.After(5 * time.Second):
+	case <-time.After(10 * time.Second):
 		return errors.New("timed out waiting for dart-sass to finish")
 	}
 }
diff --git a/transpiler_test.go b/transpiler_test.go
index 999cc12..d785f51 100644
--- a/transpiler_test.go
+++ b/transpiler_test.go
@@ -1,10 +1,8 @@
 package godartsass_test
 
 import (
-	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -63,7 +61,6 @@ func (t testImportResolver) Load(url string) (godartsass.Import, error) {
 		panic("protocol error")
 	}
 	return godartsass.Import{Content: t.content, SourceSyntax: t.sourceSyntax}, nil
-
 }
 
 func TestTranspilerVariants(t *testing.T) {
@@ -179,19 +176,17 @@ body {
 }
 
 func TestIncludePaths(t *testing.T) {
-	dir1, _ := ioutil.TempDir(os.TempDir(), "libsass-test-include-paths-dir1")
-	defer os.RemoveAll(dir1)
-	dir2, _ := ioutil.TempDir(os.TempDir(), "libsass-test-include-paths-dir2")
-	defer os.RemoveAll(dir2)
+	dir1 := t.TempDir()
+	dir2 := t.TempDir()
 
 	colors := filepath.Join(dir1, "_colors.scss")
 	content := filepath.Join(dir2, "_content.scss")
 
-	ioutil.WriteFile(colors, []byte(`
+	os.WriteFile(colors, []byte(`
 $moo:       #f442d1 !default;
 `), 0o644)
 
-	ioutil.WriteFile(content, []byte(`
+	os.WriteFile(content, []byte(`
 content { color: #ccc; }
 `), 0o644)
 
@@ -330,7 +325,6 @@ div { color: $primary-color; }`, gor)
 	wg.Wait()
 
 	c.Assert(transpiler.IsShutDown(), qt.Equals, true)
-
 }
 
 func BenchmarkTranspiler(b *testing.B) {
@@ -414,7 +408,7 @@ func TestVersion(t *testing.T) {
 	version, err := godartsass.Version(getSassEmbeddedFilename())
 	c.Assert(err, qt.IsNil)
 	c.Assert(version, qt.Not(qt.Equals), "")
-	c.Assert(version.ProtocolVersion, qt.Equals, "2.0.0")
+	c.Assert(version.ProtocolVersion, qt.Equals, "2.7.1")
 }
 
 func newTestTranspiler(c *qt.C, opts godartsass.Options) (*godartsass.Transpiler, func()) {
@@ -436,11 +430,3 @@ func getSassEmbeddedFilename() string {
 
 	return "sass"
 }
-
-// used for debugging
-func printJSON(s string) {
-	m := make(map[string]interface{})
-	json.Unmarshal([]byte(s), &m)
-	b, _ := json.MarshalIndent(m, "", "  ")
-	fmt.Printf("%s", b)
-}