diff --git a/gopay/__init__.py b/gopay/__init__.py
index a9f7be9..628e25f 100644
--- a/gopay/__init__.py
+++ b/gopay/__init__.py
@@ -21,6 +21,9 @@ def payments(config: dict, services: dict | None = None) -> Payments:
         elif key == "gatewayUrl":
             config["gateway_url"] = config[key]
             del config[key]
+        elif key == "customUserAgent":
+            config["custom_user_agent"] = config[key]
+            del config[key]
 
     # Use Pydantic to validate the config object
     config_model = GopayConfig.parse_obj(config)
@@ -28,4 +31,4 @@ def payments(config: dict, services: dict | None = None) -> Payments:
 
     # Create and return the Payments and GoPay objects
     gopay = GoPay(config, services or {})
-    return Payments(gopay)
+    return Payments(gopay)
\ No newline at end of file
diff --git a/gopay/api.py b/gopay/api.py
index 9d8a5eb..f14bdfa 100644
--- a/gopay/api.py
+++ b/gopay/api.py
@@ -5,6 +5,7 @@
 
 from gopay.enums import ContentType, Language
 from gopay.http import ApiClient, Request, Response
+from gopay.utils import DEFAULT_USER_AGENT
 
 
 @dataclass
@@ -63,10 +64,16 @@ def call(
             method=method, path=path, content_type=content_type, body=body
         )
 
+        user_agent = self.config.get("custom_user_agent")
+        if user_agent is None:
+            user_agent = DEFAULT_USER_AGENT
+        else:
+            user_agent = self.config["custom_user_agent"]
+
         # Add some default headers
         request.headers = {
             "Accept": "application/json",
-            "User-Agent": "GoPay Python SDK",
+            "User-Agent": user_agent,
             "Accept-Language": "cs-CZ"
             if self.config["language"] in [Language.CZECH, Language.SLOVAK]
             else "en-US",
diff --git a/gopay/models.py b/gopay/models.py
index 022aeb7..5f980da 100644
--- a/gopay/models.py
+++ b/gopay/models.py
@@ -19,3 +19,4 @@ class GopayConfig(GopayModel):
     timeout: Optional[int] = None
     scope: enums.TokenScope = enums.TokenScope.ALL
     language: enums.Language = enums.Language.CZECH
+    custom_user_agent: Optional[str] = None
diff --git a/gopay/utils.py b/gopay/utils.py
new file mode 100644
index 0000000..7e68aef
--- /dev/null
+++ b/gopay/utils.py
@@ -0,0 +1,8 @@
+import tomli
+
+def get_project_version():
+    with open('../pyproject.toml', 'rb') as file:
+        pyproject_data = tomli.load(file)
+    return pyproject_data['tool']['poetry']['version']
+
+DEFAULT_USER_AGENT = "GoPay Python " + get_project_version()
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 05242da..d82d5d4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ name = "gopay"
 packages = [{include = "gopay"}]
 readme = "README.md"
 repository = "https://github.com/gopaycommunity/gopay-python-api"
-version = "2.2.0"
+version = "2.2.1"
 
 [tool.poetry.dependencies]
 deprecated = "^1.2.14"