Start with 1.20.4

forge/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    id("net.minecraftforge.gradle") version "6.+"
+    id("net.minecraftforge.gradle") version "[6.0.16,6.2)"
     id("org.spongepowered.mixin") version "0.7-SNAPSHOT"
     id("idea")
     id("eclipse")
@@ -13,10 +13,7 @@ val forgeVersionRange: String by extra
 group = "net.tonimatasdev"
 version = "$modVersion-$minecraftVersion"
 
-java {
-    toolchain.languageVersion.set(JavaLanguageVersion.of(17))
-    withSourcesJar()
-}
+java.toolchain.languageVersion.set(JavaLanguageVersion.of(17))
 
 minecraft {
     mappings("official", minecraftVersion)

gradle.properties

@@ -4,10 +4,10 @@ org.gradle.daemon=false
 # Mod Properties
 modVersion=1.2.2
 
-minecraftVersion=1.20.3
-forgeVersion=49.0.2
-forgeVersionRange=48
-neoforgeVersion=20.3.8-beta
-neoforgeVersionRange=20.3
+minecraftVersion=1.20.4
+forgeVersion=49.0.3
+forgeVersionRange=49
+neoforgeVersion=20.4.4-beta
+neoforgeVersionRange=20.4
 loaderVersion=0.15.1
 yarnMappings=1

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists