diff --git a/secret_loader/__init__.py b/secret_loader/__init__.py
index ccc3b84..efe55bf 100644
--- a/secret_loader/__init__.py
+++ b/secret_loader/__init__.py
@@ -105,7 +105,7 @@ class SecretLoader:
         Hardcoded values are stored directly, and can be used to configure the
         other subsystems.
         """
-        self.hardcoded: dict[str, str] = hardcoded
+        self.hardcoded: dict[str, str] = {k.lower(): v for k,v in hardcoded.items()}
         self.pass_folder = None
         self.vault_client = None
         self.env_key_prefix = None
@@ -125,10 +125,11 @@ class SecretLoader:
 
         # Setup secrets path
         self.secret_folder = Path(
-            self.hardcoded.get(ENV_KEY_SECRETS_DIRECTORY)
+            self.hardcoded.get(ENV_KEY_SECRETS_DIRECTORY.lower())
             or self._load_or_none_env(ENV_KEY_SECRETS_DIRECTORY)
             or DEFAULT_SECRETS_DIRECTORY,
         )
+        logger.info('Secrets folder is set to: %s', self.secret_folder)
 
         # Setup pass
         self.pass_folder = self._load_or_none(ENV_KEY_PASS_FOLDER)
@@ -161,7 +162,7 @@ class SecretLoader:
         return `None` if not found.
         """
         return (
-            self.hardcoded.get(secret_name)
+            self.hardcoded.get(secret_name.lower())
             or self._load_or_none_path_or_file(secret_name)
             or self._load_or_none_local_password_store(secret_name)
         )
@@ -188,7 +189,10 @@ class SecretLoader:
             return None
 
     def _load_or_none_env(self, secret_name) -> str | None:
-        return os.environ.get(f'{self.env_key_prefix}_{secret_name.upper()}')
+        if self.env_key_prefix is None:
+            return None
+        env_key = f'{self.env_key_prefix}_{secret_name.upper()}'
+        return os.environ.get(env_key)
 
     def _load_or_none_local_password_store(self, secret_name: str) -> str | None:
         """Load secret from the `pass` password manager.