diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6df7613ac6..4d1394aa38 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [ '18', '16', '14' ]
+        node: [ '20', '18', '16' ]
     name: Node ${{ matrix.node }} validation
     steps:
       - uses: actions/checkout@v4
diff --git a/src/config.ts b/src/config.ts
index 00bae6d2ca..f4ea172d0d 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -126,7 +126,7 @@ export class KubeConfig {
 
     public loadFromFile(file: string, opts?: Partial<ConfigOptions>): void {
         const rootDirectory = path.dirname(file);
-        this.loadFromString(fs.readFileSync(file, 'utf8'), opts);
+        this.loadFromString(fs.readFileSync(file).toString('utf-8'), opts);
         this.makePathsAbsolute(rootDirectory);
     }
 
@@ -245,7 +245,7 @@ export class KubeConfig {
         const namespaceFile = `${pathPrefix}${Config.SERVICEACCOUNT_NAMESPACE_PATH}`;
         let namespace: string | undefined;
         if (fileExists(namespaceFile)) {
-            namespace = fs.readFileSync(namespaceFile, 'utf8');
+            namespace = fs.readFileSync(namespaceFile).toString('utf-8');
         }
         this.contexts = [
             {