diff --git a/pages/notices/upgrade-13.mdx b/pages/notices/upgrade-13.mdx
index e7bb62887..6f7748406 100644
--- a/pages/notices/upgrade-13.mdx
+++ b/pages/notices/upgrade-13.mdx
@@ -67,7 +67,7 @@ Several components have been updated to improve incident response capabilities:
 
 **OptimismPortal**
 
-*   `OptimsimPortal.setRespectedGameType(...)` no longer sets the respected game type and retirement timestamp simultaneously
+*   `OptimismPortal.setRespectedGameType(...)` no longer sets the respected game type and retirement timestamp simultaneously
 *   A special reserved input value can be used to set the retirement timestamp
 *   `OptimismPortal.checkWithdrawal(...)` now asserts that a FaultDisputeGame was the respected game type at the time of creation