diff --git a/README.md b/README.md
index 08de5602..c2dc8ae7 100644
--- a/README.md
+++ b/README.md
@@ -349,3 +349,25 @@ result = judge0.run(submissions=submission)
 print(result.stdout)
 print(result.post_execution_filesystem.find("./my_dir2/my_file2.txt"))
 ```
+
+### Custom Judge0 Client
+
+This example shows how to use Judge0 Python SDK with your own Judge0 instance.
+
+```python
+import judge0
+
+client = judge0.Client("http://127.0.0.1:2358")
+
+source_code = """
+#include <stdio.h>
+
+int main() {
+    printf("hello, world\\n");
+    return 0;
+}
+"""
+
+result = judge0.run(client=client, source_code=source_code, language=judge0.C)
+print(result.stdout)
+```
diff --git a/pyproject.toml b/pyproject.toml
index 58a84aaa..e0f27ab2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "judge0"
-version = "0.0.6"
+version = "0.0.7"
 description = "The official Python SDK for Judge0."
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/src/judge0/__init__.py b/src/judge0/__init__.py
index ae62b15f..28a89f41 100644
--- a/src/judge0/__init__.py
+++ b/src/judge0/__init__.py
@@ -30,7 +30,7 @@
 from .retry import MaxRetries, MaxWaitTime, RegularPeriodRetry
 from .submission import Submission
 
-__version__ = "0.0.6"
+__version__ = "0.0.7"
 
 __all__ = [
     "ATD",
@@ -65,9 +65,9 @@
 
 JUDGE0_IMPLICIT_CE_CLIENT = None
 JUDGE0_IMPLICIT_EXTRA_CE_CLIENT = None
-SUPPRESS_PREVIEW_WARNING = os.getenv("JUDGE0_SUPPRESS_PREVIEW_WARNING")
 
 logger = logging.getLogger(__name__)
+suppress_preview_warning = os.getenv("JUDGE0_SUPPRESS_PREVIEW_WARNING") is not None
 
 
 def _get_implicit_client(flavor: Flavor) -> Client:
@@ -107,7 +107,7 @@ def _get_implicit_client(flavor: Flavor) -> Client:
 
 
 def _get_preview_client(flavor: Flavor) -> Union[Judge0CloudCE, Judge0CloudExtraCE]:
-    if SUPPRESS_PREVIEW_WARNING is not None:
+    if not suppress_preview_warning:
         logger.warning(
             "You are using a preview version of the client which is not recommended"
             " for production.\n"
diff --git a/src/judge0/clients.py b/src/judge0/clients.py
index 49d1ac61..7b50047c 100644
--- a/src/judge0/clients.py
+++ b/src/judge0/clients.py
@@ -33,7 +33,7 @@ class Client:
     def __init__(
         self,
         endpoint,
-        auth_headers,
+        auth_headers=None,
         *,
         retry_strategy: Optional[RetryStrategy] = None,
     ) -> None: