diff --git a/CHANGELOG.md b/CHANGELOG.md
index 02d2972..afa080e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+- Missing values from cluster upgrade operation state enum
 
 ## [3.6.4] - 2025-04-07
 ### Added
diff --git a/src/models/operation.cr b/src/models/operation.cr
index b74a61d..c710b36 100644
--- a/src/models/operation.cr
+++ b/src/models/operation.cr
@@ -19,13 +19,20 @@ module CB::Model
     enum State
       Canceling
       Creating
+      Destroying
       DisablingHA
       EnablingHA
       FailingOver
+      Finalizing
       InProgress
       Ready
-      ReplayingWAL
-      Scheduled
+      Replaying
+      Restarting
+      Restoring
+      Resuming
+      Starting
+      Suspended
+      Suspending
       WaitingForHAStandby
 
       def to_s(io : IO) : Nil