diff --git a/build.gradle b/build.gradle
index cdf0e28..8bdf783 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ dependencies {
 	includeMod "terraform-api", "com.terraformersmc.terraform-api:terraform-wood-api-v1:${project.terraform_wood_api_version}"
 
 	if (findProject(':traverse-worldgen') != null) {
-		includeMod "biolith", "com.terraformersmc:biolith:${biolith_version}"
+		includeMod "biolith", "com.terraformersmc:biolith-fabric:${biolith_version}"
 	}
 
 	afterEvaluate {
diff --git a/gradle.properties b/gradle.properties
index 1f1aab0..ceedf88 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,21 +4,21 @@ fabric.loom.multiProjectOptimisation=true
 maven_group=com.terraformersmc
 archive_name=traverse
 
-minecraft_version=1.20.3
-yarn_mappings=1.20.3+build.1
-loader_version=0.15.1
+minecraft_version=23w51b
+yarn_mappings=23w51b+build.4
+loader_version=0.15.3
+fabric_version=0.93.1+1.20.5
 terraform_biome_remapper_api_version=9.0.0
 terraform_config_api_version=9.0.0
 terraform_surfaces_api_version=9.0.0
 terraform_tree_api_version=9.0.0
 terraform_wood_api_version=9.0.0
-fabric_version=0.91.1+1.20.3
 
 # Biolith for worldgen module and testing
-biolith_version=1.1.0-beta.1
+biolith_version=1.2.0-beta.1
 
 # TerraBlender for worldgen module and testing
-terrablender_version=1.20.3-3.3.0.2
+terrablender_version=1.20.4-3.3.0.5
 
 # Project Metadata
 project_name=Traverse
@@ -31,14 +31,14 @@ default_release_type=alpha
 # CurseForge Metadata
 curseforge_slug=traverse
 curseforge_id=308777
-curseforge_game_versions=1.20.3, 1.20.4, Fabric, Quilt
+curseforge_game_versions=1.20.5-Snapshot, Fabric, Quilt
 curseforge_required_dependencies=fabric-api
 curseforge_optional_dependencies=
 
 # Modrinth Metadata
 modrinth_slug=traverse
 modrinth_id=kXygSBVI
-modrinth_game_versions=1.20.3, 1.20.4
+modrinth_game_versions=23w51b
 modrinth_mod_loaders=fabric, quilt
 modrinth_required_dependencies=fabric-api
 #modrinth_embedded_dependencies=biolith
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
index 2756d24..fd0583a 100644
--- a/src/main/resources/fabric.mod.json
+++ b/src/main/resources/fabric.mod.json
@@ -14,7 +14,7 @@
   "depends": {
     "fabricloader": ">=0.15",
     "fabric-api": ">=0.77.0",
-    "minecraft": ">=1.20.3 <1.21",
+    "minecraft": ">=1.20.4 <1.21",
     "java": ">=17"
   },
   "authors": [
diff --git a/worldgen/build.gradle b/worldgen/build.gradle
index 7b6715d..7633c76 100644
--- a/worldgen/build.gradle
+++ b/worldgen/build.gradle
@@ -6,7 +6,7 @@ loom {
 
 dependencies {
 	// Biolith and TerraBlender for the worldgen API modules
-	modImplementation "com.terraformersmc:biolith:${biolith_version}"
+	modImplementation "com.terraformersmc:biolith-fabric:${biolith_version}"
 	modCompileOnlyApi "com.github.glitchfiend:TerraBlender-fabric:${terrablender_version}"
 
 	implementation project(path: ':traverse-common')
diff --git a/worldgen/src/main/java/com/terraformersmc/traverse/biomegen/TraverseBiolithGeneration.java b/worldgen/src/main/java/com/terraformersmc/traverse/biomegen/TraverseBiolithGeneration.java
index b2f6f79..5d56b68 100644
--- a/worldgen/src/main/java/com/terraformersmc/traverse/biomegen/TraverseBiolithGeneration.java
+++ b/worldgen/src/main/java/com/terraformersmc/traverse/biomegen/TraverseBiolithGeneration.java
@@ -1,6 +1,8 @@
 package com.terraformersmc.traverse.biomegen;
 
 import com.terraformersmc.biolith.api.biome.BiomePlacement;
+import com.terraformersmc.biolith.api.compat.BiolithCompats;
+import com.terraformersmc.biolith.api.compat.ModernBetaBiomeKeys;
 import com.terraformersmc.biolith.api.surface.SurfaceGeneration;
 import com.terraformersmc.traverse.Traverse;
 import com.terraformersmc.traverse.config.TraverseBiomeConfig;
@@ -21,6 +23,56 @@ public void addBiomes() {
 		if (BIOME_CONFIG.isBiomeEnabled(LUSH_SWAMP))               { BiomePlacement.replaceOverworld(BiomeKeys.SWAMP, LUSH_SWAMP, 0.2D); }
 		if (BIOME_CONFIG.isBiomeEnabled(SNOWY_CONIFEROUS_FOREST))  { BiomePlacement.replaceOverworld(BiomeKeys.SNOWY_TAIGA, SNOWY_CONIFEROUS_FOREST, 0.2D); }
 		if (BIOME_CONFIG.isBiomeEnabled(WOODLANDS))                { BiomePlacement.replaceOverworld(BiomeKeys.BIRCH_FOREST, WOODLANDS, 0.2D); }
+
+		// Target some Modern Beta biomes for replacement by ours.
+		if (BiolithCompats.isCompatEnabled(BiolithCompats.MODERN_BETA)) {
+			if (BIOME_CONFIG.isBiomeEnabled(AUTUMNAL_WOODS)) {
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_420, AUTUMNAL_WOODS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_611, AUTUMNAL_WOODS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.ALPHA, AUTUMNAL_WOODS, 0.4D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_SKY, AUTUMNAL_WOODS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_SEASONAL_FOREST, AUTUMNAL_WOODS, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.PE_SEASONAL_FOREST, AUTUMNAL_WOODS, 0.2D);
+			}
+			if (BIOME_CONFIG.isBiomeEnabled(CONIFEROUS_FOREST)) {
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_611, CONIFEROUS_FOREST, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.ALPHA, CONIFEROUS_FOREST, 0.4D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_TAIGA, CONIFEROUS_FOREST, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.PE_TAIGA, CONIFEROUS_FOREST, 0.2D);
+			}
+			if (BIOME_CONFIG.isBiomeEnabled(DESERT_SHRUBLAND)) {
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_DESERT, DESERT_SHRUBLAND, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.PE_DESERT, DESERT_SHRUBLAND, 0.3D);
+			}
+			if (BIOME_CONFIG.isBiomeEnabled(FLATLANDS)) {
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_227, FLATLANDS, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_415, FLATLANDS, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_420, FLATLANDS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_611, FLATLANDS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.ALPHA, FLATLANDS, 0.4D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_SKY, FLATLANDS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_PLAINS, FLATLANDS, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.PE_PLAINS, FLATLANDS, 0.2D);
+			}
+			if (BIOME_CONFIG.isBiomeEnabled(LUSH_SWAMP)) {
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_SWAMPLAND, LUSH_SWAMP, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.PE_SWAMPLAND, LUSH_SWAMP, 0.3D);
+			}
+			if (BIOME_CONFIG.isBiomeEnabled(SNOWY_CONIFEROUS_FOREST)) {
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.ALPHA_WINTER, SNOWY_CONIFEROUS_FOREST, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_TUNDRA, SNOWY_CONIFEROUS_FOREST, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.PE_TUNDRA, SNOWY_CONIFEROUS_FOREST, 0.2D);
+			}
+			if (BIOME_CONFIG.isBiomeEnabled(WOODLANDS)) {
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_415, WOODLANDS, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_420, WOODLANDS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.INFDEV_611, WOODLANDS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.ALPHA, WOODLANDS, 0.4D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_SKY, WOODLANDS, 0.3D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.BETA_FOREST, WOODLANDS, 0.2D);
+				BiomePlacement.replaceOverworld(ModernBetaBiomeKeys.PE_FOREST, WOODLANDS, 0.2D);
+			}
+		}
 	}
 
 	// Use Biolith to register our Biome placements.
diff --git a/worldgen/src/main/resources/fabric.mod.json b/worldgen/src/main/resources/fabric.mod.json
index 690c953..a8af2bb 100644
--- a/worldgen/src/main/resources/fabric.mod.json
+++ b/worldgen/src/main/resources/fabric.mod.json
@@ -20,6 +20,6 @@
     }
   },
   "depends": {
-    "biolith": "*"
+    "biolith": ">=1.2.0-beta.1"
   }
 }