diff --git a/build.gradle b/build.gradle
index 86c7d57..4452db6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -19,8 +19,8 @@ apply plugin: 'eclipse'
 apply plugin: 'maven-publish'
 
 ext {
-    MC_VERSION = '1.15.1'
-    FORGE_VERSION = '30.0.7'
+    MC_VERSION = '1.15.2'
+    FORGE_VERSION = '31.1.0'
     MY_VERSION = gitVersion()
     MODID = 'chunknogobyebye'
     changelog = rootProject.file('build/changelog.txt')
@@ -41,8 +41,8 @@ sourceSets {
 }
 
 minecraft {
-    mappings channel: 'snapshot', version: '20190719-1.14.3'
-    accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
+    mappings channel: 'snapshot', version: '20200201-1.15.1'
+    //accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')
 
     runs {
         client {
@@ -73,6 +73,7 @@ minecraft {
             workingDirectory project.file('run')
             property 'forge.logging.markers', 'SCAN,REGISTRIES,REGISTRYDUMP'
             property 'forge.logging.console.level', 'info'
+            property 'fml.earlyprogresswindow', 'false'
 
             args '--mod', MODID, '--all', '--output', file('src/generated/resources/')
 
diff --git a/src/main/java/net/minecraftforge/lex/cngbb/DataCreator.java b/src/main/java/net/minecraftforge/lex/cngbb/DataCreator.java
index b80f97b..a95deab 100644
--- a/src/main/java/net/minecraftforge/lex/cngbb/DataCreator.java
+++ b/src/main/java/net/minecraftforge/lex/cngbb/DataCreator.java
@@ -94,7 +94,7 @@ private static void save(DirectoryCache cache, Object object, Path target) throw
            }
         }
 
-        cache.func_208316_a(target, hash);
+        cache.recordHash(target, hash);
     }
 
     private static class Recipes extends RecipeProvider {
@@ -134,13 +134,13 @@ private class Blocks extends BlockLootTables {
             private Set<Block> knownBlocks = new HashSet<>();
 
             protected void addTables() {
-                this.func_218492_c(LOADER_BLOCK.get());
+                this.registerDropSelfLootTable(LOADER_BLOCK.get());
             }
 
             @Override
-            public void func_218492_c(Block block) {
+            public void registerDropSelfLootTable(Block block) {
                 knownBlocks.add(block);
-                super.func_218492_c(block);
+                super.registerDropSelfLootTable(block);
             }
 
             @Override
diff --git a/src/main/resources/META-INF/accesstransformer.cfg b/src/main/resources/META-INF/accesstransformer.cfg
deleted file mode 100644
index 14d49fa..0000000
--- a/src/main/resources/META-INF/accesstransformer.cfg
+++ /dev/null
@@ -1,2 +0,0 @@
-public net.minecraft.data.RecipeProvider func_200403_a(Lnet/minecraft/util/IItemProvider;)Lnet/minecraft/advancements/criterion/InventoryChangeTrigger$Instance; # hasItem
-public net.minecraft.data.loot.BlockLootTables field_218581_i # Table Map
\ No newline at end of file
diff --git a/src/main/resources/META-INF/mods.toml b/src/main/resources/META-INF/mods.toml
index 340d0f3..f312b90 100644
--- a/src/main/resources/META-INF/mods.toml
+++ b/src/main/resources/META-INF/mods.toml
@@ -1,5 +1,5 @@
 modLoader="javafml"
-loaderVersion="[30,)"
+loaderVersion="[31,)"
 # A URL to refer people to when problems occur with this mod
 #issueTrackerURL="http://my.issue.tracker/" #optional
 
@@ -17,13 +17,13 @@ loaderVersion="[30,)"
 [[dependencies.chunknogobyebye]]
     modId="forge"
     mandatory=true
-    versionRange="[30,)"
+    versionRange="[31,)"
     ordering="NONE"
     side="BOTH"
     
 [[dependencies.chunknogobyebye]]
     modId="minecraft"
     mandatory=true
-    versionRange="[1.15.1]"
+    versionRange="[1.15.2]"
     ordering="NONE"
     side="BOTH"