diff --git a/src/django_tailwind_cli/config.py b/src/django_tailwind_cli/config.py
index 4950b9c..0a5749a 100644
--- a/src/django_tailwind_cli/config.py
+++ b/src/django_tailwind_cli/config.py
@@ -46,6 +46,9 @@ def build_cmd(self) -> list[str]:
             "--minify",
         ]
 
+        if self.config_file:
+            result.extend(["--config", str(self.config_file)])
+        
         if self.src_css:
             result.extend(["--input", str(self.src_css)])
 
diff --git a/tests/test_config.py b/tests/test_config.py
index ffbd022..9316d14 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -258,6 +258,8 @@ def test_build_cmd_for_tailwind_css_3_x(settings: LazySettings):
         "--output",
         str(c.dist_css),
         "--minify",
+        "--config",
+        str(c.config_file),
     ]