diff --git a/README.md b/README.md
index f5359d0..d25c2fd 100644
--- a/README.md
+++ b/README.md
@@ -50,7 +50,7 @@ from qc_ositrace.checks.deserialization import deserialization_checker
 ```bash
 qc_ositrace --help
 
-usage: QC OSI Trace Checker [-h] (-d | -c CONFIG_PATH) [-i INPUT_FILE] [--osiTopic OSITOPIC] [--osiType OSITYPE]
+usage: QC OSI Trace Checker [-h] [-d | -c CONFIG_PATH] [-i INPUT_FILE] [--osiTopic OSITOPIC] [--osiType OSITYPE]
                             [--osiVersion OSIVERSION] [--osiRulesFile OSIRULESFILE] [-r RESULT_FILE]
                             [--output_config OUTPUT_CONFIG]
 
@@ -58,7 +58,7 @@ ASAM QC checker bundle for checking the validity of OSI Trace (.osi/.mcap) files
 
 options:
   -h, --help            show this help message and exit
-  -d, --default_config
+  -d, --default_config  Deprecated. Default configuration is used whenever -c is omitted.
   -c, --config_path CONFIG_PATH
   -i, --input_file INPUT_FILE
                         Path to the input OSI Trace file.
@@ -77,7 +77,7 @@ options:
 Example checking a simple SensorData trace file against version 3.7.0 rules using default configuration:
 
 ```bash
-qc_ositrace -d -r results.xqar --osiType SensorData --osiVersion 3.7.0 -i 20210818T150542Z_sd_370_300_1523_example_sensordata_trace.osi
+qc_ositrace -r results.xqar --osiType SensorData --osiVersion 3.7.0 -i 20210818T150542Z_sd_370_300_1523_example_sensordata_trace.osi
 ```
 
 ### Example output
@@ -144,7 +144,7 @@ It is also possible to execute the qc_ositrace application using Poetry:
 ```bash
 poetry run qc_ositrace --help
 
-usage: QC OSI Trace Checker [-h] (-d | -c CONFIG_PATH) [-i INPUT_FILE] [--osiTopic OSITOPIC] [--osiType OSITYPE]
+usage: QC OSI Trace Checker [-h] [-d | -c CONFIG_PATH] [-i INPUT_FILE] [--osiTopic OSITOPIC] [--osiType OSITYPE]
                             [--osiVersion OSIVERSION] [--osiRulesFile OSIRULESFILE] [-r RESULT_FILE]
                             [--output_config OUTPUT_CONFIG]
 
@@ -152,7 +152,7 @@ ASAM QC checker bundle for checking the validity of OSI Trace (.osi/.mcap) files
 
 options:
   -h, --help            show this help message and exit
-  -d, --default_config
+  -d, --default_config  Deprecated. Default configuration is used whenever -c is omitted.
   -c, --config_path CONFIG_PATH
   -i, --input_file INPUT_FILE
                         Path to the input OSI Trace file.
diff --git a/qc_ositrace/main.py b/qc_ositrace/main.py
index 2babddb..473170b 100644
--- a/qc_ositrace/main.py
+++ b/qc_ositrace/main.py
@@ -18,9 +18,14 @@ def args_entrypoint() -> argparse.Namespace:
         description="ASAM QC checker bundle for checking the validity of OSI Trace (.osi/.mcap) files.",
     )
 
-    group = parser.add_mutually_exclusive_group(required=True)
-    group.add_argument("-d", "--default_config", action="store_true")
-    group.add_argument("-c", "--config_path")
+    config_group = parser.add_mutually_exclusive_group()
+    config_group.add_argument(
+        "-d",
+        "--default_config",
+        action="store_true",
+        help="Deprecated. Default configuration is used whenever -c is omitted.",
+    )
+    config_group.add_argument("-c", "--config_path")
 
     parser.add_argument(
         "-i",
@@ -95,7 +100,7 @@ def main():
     logging.info("Initializing checks")
 
     config = Configuration()
-    if args.default_config:
+    if args.config_path is None:
         logging.info("Using default configuration")
         config.register_checker_bundle(checker_bundle_name=constants.BUNDLE_NAME)
     else: