diff --git a/build.gradle b/build.gradle
index 37d763fa0..87c764a1e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -210,14 +210,10 @@ publishing {
 unifiedPublishing {
 	project {
 		releaseType = "${ENV.RELEASE_TYPE ?: 'release'}"
-		gameVersions = [
-				rootProject.minecraft_version,
-				'1.21'
-		]
+		gameVersions = Arrays.asList(rootProject.supported_versions.split(', '))
 		gameLoaders = ["neoforge"]
 		displayName = "$mod_name NeoForge $project.version"
 		changelog = "https://kubejs.com/changelog?mc=${project.minecraft_version}"
-		// FIXME this is a guess, it was loom's remapJar
 		mainPublication jar
 
 		relations {
diff --git a/gradle.properties b/gradle.properties
index 6ea1d1b1f..55ab4cf69 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -10,12 +10,13 @@ curseforge_id=238086
 modrinth_id=umyGl7zF
 
 minecraft_version=1.21.1
+supported_versions=1.21.1, 1.21
 mod_version=2101.7.0
 
 neoforge_version=21.1.31
 parchment_mc_version=1.21
 parchment_mapping_version=2024.07.28
-rhino_version=2100.2.5-build.48
+rhino_version=2101.2.5-build.52
 tiny_server_version=1.0.0-build.6
 gif_lib_version=1.7
 
diff --git a/src/main/java/dev/latvian/mods/kubejs/KubeJS.java b/src/main/java/dev/latvian/mods/kubejs/KubeJS.java
index 5fc9b95f5..01b728f25 100644
--- a/src/main/java/dev/latvian/mods/kubejs/KubeJS.java
+++ b/src/main/java/dev/latvian/mods/kubejs/KubeJS.java
@@ -42,8 +42,8 @@ public class KubeJS {
 	public static final String MOD_ID = "kubejs";
 	public static final String MOD_NAME = "KubeJS";
 	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_NAME);
-	public static final int MC_VERSION_NUMBER = 2006;
-	public static final String MC_VERSION_STRING = "1.20.6";
+	public static final int MC_VERSION_NUMBER = 2101;
+	public static final String MC_VERSION_STRING = "1.21.1";
 	public static String QUERY;
 	public static String VERSION = "0";
 
diff --git a/src/main/resources/META-INF/neoforge.mods.toml b/src/main/resources/META-INF/neoforge.mods.toml
index 16dde9dc4..12fcf1add 100644
--- a/src/main/resources/META-INF/neoforge.mods.toml
+++ b/src/main/resources/META-INF/neoforge.mods.toml
@@ -1,6 +1,6 @@
 modLoader = "javafml"
 loaderVersion = "[2,)"
-issueTrackerURL = "https://kubejs.com/support?source=kubejs&mc=2006&loader=neoforge"
+issueTrackerURL = "https://kubejs.com/support?source=kubejs&mc=2101&loader=neoforge"
 license = "GNU LGPLv3"
 
 [[mods]]