diff --git a/Source/Saml2.Authentication.Core/Configuration/Saml2Options.cs b/Source/Saml2.Authentication.Core/Configuration/Saml2Options.cs
index def6a20..6ba07ed 100644
--- a/Source/Saml2.Authentication.Core/Configuration/Saml2Options.cs
+++ b/Source/Saml2.Authentication.Core/Configuration/Saml2Options.cs
@@ -22,7 +22,8 @@ public Saml2Options()
                 Name = $"{Saml2Defaults.SessionKeyPrefix}.{Guid.NewGuid():N}",
                 HttpOnly = true,
                 SameSite = SameSiteMode.None,
-                SecurePolicy = CookieSecurePolicy.SameAsRequest
+                SecurePolicy = CookieSecurePolicy.SameAsRequest,
+                IsEssential = true
             };
         }
 
@@ -68,4 +69,4 @@ public override CookieOptions Build(HttpContext context, DateTimeOffset expiresF
             return cookieOptions;
         }
     }
-}
\ No newline at end of file
+}