diff --git a/.gitignore b/.gitignore
index 01f3a95..d803b5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ push_to_twine.sh
 ./Pipfile
 env/
 .DS_STORE
+.idea
\ No newline at end of file
diff --git a/Maintaining.md b/Maintaining.md
index d5dad64..6874f39 100644
--- a/Maintaining.md
+++ b/Maintaining.md
@@ -12,8 +12,9 @@
 	- Install project as local package `pip install -e .`
 - Make your code changes
 - Increase `version` value on:
-	- `./setup.py` file
-	- `./midtransclient/__init__.py` file
+    - `./setup.py` file
+    - `./midtransclient/__init__.py` file
+    - `./midtransclient/http_client.py` file on User-Agent value
 - To install the package locally with a symlink `pip install -e .`
 - To run test, run `pytest`
 	- To run specific test, e.g: `pytest -k "test_core_api_charge_fail_401"`
diff --git a/midtransclient/__init__.py b/midtransclient/__init__.py
index e90f0f8..6caff84 100644
--- a/midtransclient/__init__.py
+++ b/midtransclient/__init__.py
@@ -4,4 +4,4 @@
 from .error_midtrans import MidtransAPIError
 from .error_midtrans import JSONDecodeError
 
-__version__ = '1.4.0'
+__version__ = '1.4.1'
diff --git a/midtransclient/http_client.py b/midtransclient/http_client.py
index a72bd08..1a0bffd 100644
--- a/midtransclient/http_client.py
+++ b/midtransclient/http_client.py
@@ -39,7 +39,7 @@ def request(self, method, server_key, request_url, parameters=dict(),
         default_headers = {
             'content-type': 'application/json',
             'accept': 'application/json',
-            'user-agent': 'midtransclient-python/1.2.0'
+            'user-agent': 'midtransclient-python/1.4.1'
         }
         headers = default_headers
 
diff --git a/setup.py b/setup.py
index b21ba9d..6e8158f 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
 
 setup(
     name="midtransclient",
-    version="1.4.0",
+    version="1.4.1",
     author="Midtrans - Integration Support Team",
     author_email="support@midtrans.com",
     license='MIT',
diff --git a/tests/test_http_client.py b/tests/test_http_client.py
index 8d3e7b9..27f9aee 100644
--- a/tests/test_http_client.py
+++ b/tests/test_http_client.py
@@ -68,7 +68,7 @@ def test_is_custom_headers_applied():
         custom_headers=custom_headers)
 
         # Fetch the headers from requests.request arguments
-        headers = mock_request.call_args.kwargs['headers']
+        headers = mock_request.call_args[1]['headers']
         
         # Make sure default header still exist
         assert headers.get('content-type') == 'application/json'
diff --git a/tests/test_snap.py b/tests/test_snap.py
index b16ddc3..5fa2d8c 100644
--- a/tests/test_snap.py
+++ b/tests/test_snap.py
@@ -58,7 +58,7 @@ def test_snap_status_fail_404():
 
 def test_snap_request_fail_401():
     snap = generate_snap_instance()
-    snap.api_config.server_key=''
+    snap.api_config.server_key='dummy'
     param = generate_param_min()
     err = ''
     try:
@@ -94,7 +94,7 @@ def test_snap_request_fail_zero_gross_amount():
 
 def test_snap_exception_MidtransAPIError():
     snap = generate_snap_instance()
-    snap.api_config.server_key=''
+    snap.api_config.server_key='dummy'
     param = generate_param_min()
     err = ''
     try: