diff --git a/dbterd/adapters/base.py b/dbterd/adapters/base.py
index d7f073f..766694a 100644
--- a/dbterd/adapters/base.py
+++ b/dbterd/adapters/base.py
@@ -179,8 +179,9 @@ def __save_result(self, path, data):
             click.FileError: Can not save the file
         """
         try:
-            with open(f"{path}/{data[0]}", "w") as f:
-                logger.info(path)
+            file_path = f"{path}/{data[0]}"
+            with open(file_path, "w") as f:
+                logger.info(f"Output saved to {file_path}")
                 f.write(data[1])
         except Exception as e:
             logger.error(str(e))
diff --git a/dbterd/adapters/targets/d2/d2_test_relationship.py b/dbterd/adapters/targets/d2/d2_test_relationship.py
index ecfcce4..c918f3a 100644
--- a/dbterd/adapters/targets/d2/d2_test_relationship.py
+++ b/dbterd/adapters/targets/d2/d2_test_relationship.py
@@ -14,7 +14,8 @@ def run(manifest: Manifest, catalog: Catalog, **kwargs) -> Tuple[str, str]:
     Returns:
         Tuple(str, str): File name and the D2 content
     """
-    return ("output.d2", parse(manifest, catalog, **kwargs))
+    output_file_name = kwargs.get("output_file_name", "output.d2")
+    return (output_file_name, parse(manifest, catalog, **kwargs))
 
 
 def parse(manifest: Manifest, catalog: Catalog, **kwargs) -> str:
diff --git a/dbterd/adapters/targets/dbml/dbml_test_relationship.py b/dbterd/adapters/targets/dbml/dbml_test_relationship.py
index 6ac5b63..2acdf3c 100644
--- a/dbterd/adapters/targets/dbml/dbml_test_relationship.py
+++ b/dbterd/adapters/targets/dbml/dbml_test_relationship.py
@@ -15,7 +15,8 @@ def run(manifest: Manifest, catalog: Catalog, **kwargs) -> Tuple[str, str]:
     Returns:
         Tuple(str, str): File name and the DBML content
     """
-    return ("output.dbml", parse(manifest, catalog, **kwargs))
+    output_file_name = kwargs.get("output_file_name", "output.dbml")
+    return (output_file_name, parse(manifest, catalog, **kwargs))
 
 
 def parse(manifest: Manifest, catalog: Catalog, **kwargs) -> str:
diff --git a/dbterd/adapters/targets/graphviz/graphviz_test_relationship.py b/dbterd/adapters/targets/graphviz/graphviz_test_relationship.py
index 2a2afd6..d3aa458 100644
--- a/dbterd/adapters/targets/graphviz/graphviz_test_relationship.py
+++ b/dbterd/adapters/targets/graphviz/graphviz_test_relationship.py
@@ -14,7 +14,8 @@ def run(manifest: Manifest, catalog: Catalog, **kwargs) -> Tuple[str, str]:
     Returns:
         Tuple(str, str): File name and the GraphViz content
     """
-    return ("output.graphviz", parse(manifest, catalog, **kwargs))
+    output_file_name = kwargs.get("output_file_name", "output.graphviz")
+    return (output_file_name, parse(manifest, catalog, **kwargs))
 
 
 def parse(manifest: Manifest, catalog: Catalog, **kwargs) -> str:
diff --git a/dbterd/adapters/targets/mermaid/mermaid_test_relationship.py b/dbterd/adapters/targets/mermaid/mermaid_test_relationship.py
index ca2cf28..a38609d 100644
--- a/dbterd/adapters/targets/mermaid/mermaid_test_relationship.py
+++ b/dbterd/adapters/targets/mermaid/mermaid_test_relationship.py
@@ -15,7 +15,8 @@ def run(manifest: Manifest, catalog: Catalog, **kwargs) -> Tuple[str, str]:
     Returns:
         Tuple(str, str): File name and the Mermaid content
     """
-    return ("output.md", parse(manifest, catalog, **kwargs))
+    output_file_name = kwargs.get("output_file_name", "output.md")
+    return (output_file_name, parse(manifest, catalog, **kwargs))
 
 
 def replace_column_name(column_name: str) -> str:
diff --git a/dbterd/adapters/targets/plantuml/plantuml_test_relationship.py b/dbterd/adapters/targets/plantuml/plantuml_test_relationship.py
index 60f582e..ccd6289 100644
--- a/dbterd/adapters/targets/plantuml/plantuml_test_relationship.py
+++ b/dbterd/adapters/targets/plantuml/plantuml_test_relationship.py
@@ -14,7 +14,8 @@ def run(manifest: Manifest, catalog: Catalog, **kwargs) -> Tuple[str, str]:
     Returns:
         Tuple(str, str): File name and the PlantUML content
     """
-    return ("output.plantuml", parse(manifest, catalog, **kwargs))
+    output_file_name = kwargs.get("output_file_name", "output.plantuml")
+    return (output_file_name, parse(manifest, catalog, **kwargs))
 
 
 def parse(manifest: Manifest, catalog: Catalog, **kwargs) -> str:
diff --git a/dbterd/cli/params.py b/dbterd/cli/params.py
index 15f58c4..eb3828a 100644
--- a/dbterd/cli/params.py
+++ b/dbterd/cli/params.py
@@ -63,6 +63,14 @@ def common_params(func):
         show_default=True,
         type=click.STRING,
     )
+    @click.option(
+        "--output-file-name",
+        "-ofn",
+        help="Output the result file name. Default is defined in the target module",
+        default=None,
+        show_default=True,
+        type=click.STRING,
+    )
     @click.option(
         "--omit-columns",
         help="Flag to omit columns in diagram. Currently only mermaid is supported",
diff --git a/docs/nav/guide/cli-references.md b/docs/nav/guide/cli-references.md
index 212c277..e2dc64f 100644
--- a/docs/nav/guide/cli-references.md
+++ b/docs/nav/guide/cli-references.md
@@ -173,6 +173,23 @@ Configure the path to directory containing the output diagram file.
     dbterd run --output "./target"
     ```
 
+### dbterd run --output-file-name (-ofn)
+
+Configure the output file name
+> Default to `output.{modulename}` which is defined in the target module
+
+**Examples:**
+=== "CLI"
+
+    ```bash
+    dbterd run -ofn "erd.dbml"
+    ```
+=== "CLI (long style)"
+
+    ```bash
+    dbterd run --output-file-name "erd.dbml"
+    ```
+
 ### dbterd run --target (-t)
 
 > Default to `dbml`
diff --git a/tests/unit/cli/test_runner.py b/tests/unit/cli/test_runner.py
index a89e891..d80cc6c 100644
--- a/tests/unit/cli/test_runner.py
+++ b/tests/unit/cli/test_runner.py
@@ -72,11 +72,11 @@ def test_invoke_run_with_invalid_strategy(self, dbterd: dbterdRunner) -> None:
     @pytest.mark.parametrize(
         "target, output",
         [
-            ("dbml", "output.dbml"),
-            ("mermaid", "output.md"),
-            ("plantuml", "output.plantuml"),
-            ("graphviz", "output.graphviz"),
-            ("d2", "output.d2"),
+            ("dbml", None),
+            ("mermaid", None),
+            ("plantuml", None),
+            ("graphviz", None),
+            ("d2", None),
         ],
     )
     def test_invoke_run_ok(self, target, output, dbterd: dbterdRunner) -> None: