diff --git a/GameData/RealismOverhaul/RO.version b/GameData/RealismOverhaul/RO.version
index e1d9c33826..bb22a18034 100644
--- a/GameData/RealismOverhaul/RO.version
+++ b/GameData/RealismOverhaul/RO.version
@@ -11,7 +11,7 @@
         "MAJOR": 17,
         "MINOR": 4,
         "PATCH": 2,
-        "BUILD": 0
+        "BUILD": 1
     },
     "KSP_VERSION": {
         "MAJOR": 1,
diff --git a/GameData/RealismOverhaul/changelog.cfg b/GameData/RealismOverhaul/changelog.cfg
index bf7a955e39..0b004d83e7 100644
--- a/GameData/RealismOverhaul/changelog.cfg
+++ b/GameData/RealismOverhaul/changelog.cfg
@@ -6,16 +6,26 @@ KERBALCHANGELOG
 	website = github.com/KSP-RO/RealismOverhaul
 	VERSION
 	{
-		version = 17.4.2.0
+		version = 17.4.2.1
 		versionKSP = 1.12.3
 		CHANGE
 		{
 			change = What's Changed
-			subchange = Add tank types that can only contain EC
+			subchange = Fixed utilization of battery tanks
+		}
+	}
+	VERSION
+	{
+		version = 17.4.2.0
+		versionKSP = 1.12.3
+		CHANGE
+		{
+			change = What's Changed
+			subchange = Add tank types that can only contain EC
 			subchange = Popup dialog on attempting to start career/science sandbox without RP-1
 			subchange = Use guesstimated masses for Juno 45k (looked very wrong) and early LR89s (likely didn't include gas generator or turbopump or some combination, MA-x configs kept changing)
 			subchange = Tweak A-9 mass and reliability
-			subchange = Update netkan for next CKAN client
+			subchange = Update netkan for next CKAN client
 		}
 	}
 	VERSION
diff --git a/README.md b/README.md
index e6328840c3..db5012a4fb 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 <p align="center">
  <a href="https://nightly.link/KSP-RO/RealismOverhaul/workflows/buildAndTest/master/RealismOverhaul.zip" rel="nofollow"><img src="https://badgen.net/badge/Nightly%20build/download/blue"></a>
  <a href="https://discord.gg/V73jjNd" rel="nofollow"><img src="https://badgen.net/discord/online-members/V73jjNd?icon=discord"></a>
- <a href="https://github.com/KSP-RO/RealismOverhaul/compare/v17.4.2.0...master" rel="nofollow"><img src="https://img.shields.io/github/commits-since/KSP-RO/RealismOverhaul/latest"></a>
+ <a href="https://github.com/KSP-RO/RealismOverhaul/compare/v17.4.2.1...master" rel="nofollow"><img src="https://img.shields.io/github/commits-since/KSP-RO/RealismOverhaul/latest"></a>
 </p>
 
 # Realism Overhaul