diff --git a/RealFuels/RealFuels.version b/RealFuels/RealFuels.version
index 4f681a9c..b7be595f 100644
--- a/RealFuels/RealFuels.version
+++ b/RealFuels/RealFuels.version
@@ -4,8 +4,8 @@
 	"VERSION":
 	{
 		"MAJOR": 15,
-		"MINOR": 8,
-		"PATCH": 4
+		"MINOR": 9,
+		"PATCH": 0
 	},
 	"KSP_VERSION":
 	{
diff --git a/RealFuels/changelog.cfg b/RealFuels/changelog.cfg
index f5422fc8..f3e42d41 100644
--- a/RealFuels/changelog.cfg
+++ b/RealFuels/changelog.cfg
@@ -5,6 +5,16 @@ KERBALCHANGELOG
 	author = KSP-RO team
 	website = github.com/KSP-RO/RealFuels
 	VERSION
+	{
+		version = 15.9.0.0
+		versionKSP = 1.12.3
+		CHANGE
+		{
+			change = What's Changed
+			subchange = Let RF use stock's useThrottleIspCurve 
+		}
+	}
+	VERSION
 	{
 		version = 15.8.4.0
 		versionKSP = 1.12.3