diff --git a/CHANGELOG.md b/CHANGELOG.md
index 358b3a195..e5c987594 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## V1.9.1
+This release introduces the Altai upgrade
+
 ## V1.9.0
 This release introduces the Mongolian upgrade
 
diff --git a/x/upgrade/types/upgrade_config.go b/x/upgrade/types/upgrade_config.go
index 22ca1b205..6ae2c153d 100644
--- a/x/upgrade/types/upgrade_config.go
+++ b/x/upgrade/types/upgrade_config.go
@@ -93,6 +93,10 @@ var (
 		Name:   Mongolian,
 		Height: 10314605,
 		Info:   "Mongolian hardfork",
+	}).SetPlan(&Plan{
+		Name:   Altai,
+		Height: 11917795,
+		Info:   "Altai hardfork",
 	})
 
 	TestnetChainID = "greenfield_5600-1"
@@ -140,6 +144,10 @@ var (
 		Name:   Mongolian,
 		Height: 10780238,
 		Info:   "Mongolian hardfork",
+	}).SetPlan(&Plan{
+		Name:   Altai,
+		Height: 12508117,
+		Info:   "Altai hardfork",
 	})
 )