diff --git a/dependencies.gradle b/dependencies.gradle
index da3f47fde..38711edfb 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -2,7 +2,7 @@
 
 dependencies {
     api('com.github.GTNewHorizons:Baubles-Expanded:2.2.6-GTNH:dev')
-    api('com.github.GTNewHorizons:GTNHLib:0.8.44:dev')
+    api('com.github.GTNewHorizons:GTNHLib:0.9.0:dev')
 
     compileOnly('com.github.GTNewHorizons:BuildCraft:7.1.48:api') {transitive=false}
     compileOnly('com.github.GTNewHorizons:ForgeMultipart:1.7.2:dev') {transitive=false}
@@ -15,6 +15,6 @@ dependencies {
     compileOnly("net.industrial-craft:industrialcraft-2:2.2.828-experimental:dev")
 
 
-    compileOnly("com.github.GTNewHorizons:StructureLib:1.4.25:dev")
+    compileOnly("com.github.GTNewHorizons:StructureLib:1.4.27:dev")
 }
 
diff --git a/gradle.properties b/gradle.properties
index 4b422950c..0db9f9862 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -39,14 +39,34 @@ remoteMappings = https\://raw.githubusercontent.com/MinecraftForge/FML/1.7.10/co
 # `./gradlew runClient --username=AnotherPlayer`, or configuring this command in your IDE.
 developmentEnvironmentUserName = Developer
 
-# Enables using modern Java syntax (up to version 17) via Jabel, while still targeting JVM 8.
-# See https://github.com/bsideup/jabel for details on how this works.
-enableModernJavaSyntax = true
+# Enables modern Java syntax support. Valid values:
+# - false: No modern syntax, Java 8 only
+# - jabel: Jabel syntax-only support, compiles to J8 bytecode
+# - jvmDowngrader: Full modern Java via JVM Downgrader (syntax + stdlib APIs)
+# - modern: Native modern Java bytecode, no downgrading
+enableModernJavaSyntax = jabel
 
 # If set, ignores the above setting and compiles with the given toolchain. This may cause unexpected issues,
 # and should *not* be used in most situations. -1 disables this.
 # forceToolchainVersion = -1
 
+# Target JVM version for JVM Downgrader bytecode downgrading.
+# Only used when enableModernJavaSyntax = jvmDowngrader
+# downgradeTargetVersion = 8
+
+# Comma-separated list of Java versions for multi-release jar support (JVM Downgrader only).
+# Classes will be available in META-INF/versions/N/ for each version N in this list.
+# Default: "21,25" (J25+ gets native classes, J21-24 gets partial downgrade, J8-20 gets full downgrade).
+# jvmDowngraderMultiReleaseVersions = 21,25
+
+# Specifies how JVM Downgrader API stubs are provided. Options:
+# - shade: Shade minimized stubs into the jar
+# - gtnhlib: GTNHLib provides stubs at runtime (adds version constraint)
+# - external: Another dependency provides stubs (no constraint, no warning)
+# - (empty): Warning reminding you to configure stubs
+# Note: 'shade' option requires you to verify license compliance, see: https://github.com/unimined/JvmDowngrader/blob/main/LICENSE.md
+# jvmDowngraderStubsProvider =
+
 # Enables injecting missing generics into the decompiled source code for a better coding experience.
 # Turns most publicly visible List, Map, etc. into proper List<E>, Map<K, V> types.
 enableGenericInjection = true
diff --git a/settings.gradle b/settings.gradle
index 647b0d4a6..da3076b4a 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -17,7 +17,7 @@ pluginManagement {
 }
 
 plugins {
-    id 'com.gtnewhorizons.gtnhsettingsconvention' version '2.0.10'
+    id 'com.gtnewhorizons.gtnhsettingsconvention' version '2.0.12'
 }