diff --git a/argopy/options.py b/argopy/options.py
index 592d5d5b..fc8f0fd6 100644
--- a/argopy/options.py
+++ b/argopy/options.py
@@ -92,7 +92,7 @@ def validate_http(this_path):
     SERVER: lambda x: True,
     USER: lambda x: isinstance(x, str) or x is None,
     PASSWORD: lambda x: isinstance(x, str) or x is None,
-    OPENAI_API_KEY: lambda x: isinstance(x, str),
+    OPENAI_API_KEY: lambda x: isinstance(x, str) or x is None,
     ARGOVIS_API_KEY: lambda x: isinstance(x, str) or x is None,
 }
 
diff --git a/argopy/related/__init__.py b/argopy/related/__init__.py
index d28263ae..76fd8535 100644
--- a/argopy/related/__init__.py
+++ b/argopy/related/__init__.py
@@ -4,7 +4,6 @@
 from .argo_documentation import ArgoDocs
 from .doi_snapshot import ArgoDOI
 from .euroargo_api import get_coriolis_profile_id, get_ea_profile_page
-from .utils import load_dict, mapp_dict
 from .chatgpt import Assistant
 from .utils import load_dict, mapp_dict  # Should come last