diff --git a/.github/workflows/pipeline.yml b/.github/workflows/pipeline.yml
index 174b609..63e6d4b 100644
--- a/.github/workflows/pipeline.yml
+++ b/.github/workflows/pipeline.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [18.x, 16.x, 14.x]
+        node-version: [18.x, 16.x]
       fail-fast: true
 
     steps:
diff --git a/jest.config.ts b/jest.config.ts
index df941bc..0e0bcbd 100644
--- a/jest.config.ts
+++ b/jest.config.ts
@@ -9,7 +9,7 @@ const config: Config = {
   detectOpenHandles: true,
   testMatch: ['**/*.test.js', '**/*.test.cjs', '**/*.test.mjs', '**/*.test.ts'],
   transform: {
-    '^.+\\.(ts|mjs|js|cjs)$': 'ts-jest',
+    '^.+\\.(ts)$': 'ts-jest',
   },
   moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node', 'cjs', 'mjs'],
   collectCoverageFrom: ['src/**/*.ts'],