diff --git a/advlabdb/config.py b/advlabdb/config.py
index c498382..50ee81f 100644
--- a/advlabdb/config.py
+++ b/advlabdb/config.py
@@ -6,7 +6,7 @@ from pathlib import Path
 
 def get_data_dir() -> Path:
     data_dir_env_variable = "ADVLABDB_DATA_DIR"
-    data_dir = Path(environ.get(data_dir_env_variable, "dev_data")).resolve()
+    data_dir = Path(environ.get(data_dir_env_variable, "dev/data")).resolve()
 
     if not data_dir.is_dir():
         sys.exit(