diff --git a/src/aare/gui/auth.py b/src/aare/gui/auth.py
index 30c3e923..379433b0 100644
--- a/src/aare/gui/auth.py
+++ b/src/aare/gui/auth.py
@@ -23,7 +23,7 @@ def auth(base_url: str | None, cert_path: str | None) -> str:
     cacert = f"{cert_path}"
     try:
         token_result = subprocess.run(
-            ['curl', '-s', '--cacert', CACERT,
+            ['curl', '-s', '--cacert', cacert,
              '--negotiate', '-u', ':',
              '-X', 'POST', url,
              '-d', 'username=&password=',