set is_admin default to False
diff --git a/planetstack/core/models/user.py b/planetstack/core/models/user.py
index 244ef6a..3f933fe 100644
--- a/planetstack/core/models/user.py
+++ b/planetstack/core/models/user.py
@@ -155,7 +155,7 @@
     public_key = models.TextField(null=True, blank=True, max_length=1024, help_text="Public key string")
 
     is_active = models.BooleanField(default=True)
-    is_admin = models.BooleanField(default=True)
+    is_admin = models.BooleanField(default=False)
     is_staff = models.BooleanField(default=True)
     is_readonly = models.BooleanField(default=False)