diff --git a/README.md b/README.md
index b02363c..26298d6 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Minecraft Batch Launcher
+Minecraft Batch Launcher (not updated)
 ========================
 
 ### English help ###
diff --git a/linux/mc_start.sh b/linux/mc_start.sh
old mode 100644
new mode 100755
index 9deeba2..2b6d17a
--- a/linux/mc_start.sh
+++ b/linux/mc_start.sh
@@ -1,17 +1,15 @@
 # A minecraft root directory
 MC_DIR=~/.minecraft
 
-# Game location
-GAME_DIR=$MC_DIR/profile
-
 # Assets location
 ASSETS_DIR=$MC_DIR/assets
+ASSETS_INDEX=1.15
 
 # Version to use
-VERSION=1.11.2
+VERSION=1.15.2
 
 # Native libs location
-NATIVES_DIR=$MC_DIR/versions/$VERSION/$VERSION-natives
+NATIVES_DIR=$MC_DIR/bin/$VERSION
 
 # Player name
 PLAYER=Steve
@@ -22,4 +20,13 @@ HEIGHT=640
 
 cd $MC_DIR
 
-java -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Djava.library.path=$NATIVES_DIR -Dminecraft.launcher.brand=java-minecraft-launcher -Dminecraft.launcher.version=1.6.89-j -cp $MC_DIR/libraries/com/mojang/patchy/1.1/patchy-1.1.jar;$MC_DIR/libraries/oshi-project/oshi-core/1.1/oshi-core-1.1.jar;$MC_DIR/libraries/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar;$MC_DIR/libraries/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar;$MC_DIR/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar;$MC_DIR/libraries/com/mojang/javabridge/1.0.22/javabridge-1.0.22.jar;$MC_DIR/libraries/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar;$MC_DIR/libraries/io/netty/netty-all/4.1.25.Final/netty-all-4.1.25.Final.jar;$MC_DIR/libraries/com/google/guava/guava/21.0/guava-21.0.jar;$MC_DIR/libraries/org/apache/commons/commons-lang3/3.5/commons-lang3-3.5.jar;$MC_DIR/libraries/commons-io/commons-io/2.5/commons-io-2.5.jar;$MC_DIR/libraries/commons-codec/commons-codec/1.10/commons-codec-1.10.jar;$MC_DIR/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar;$MC_DIR/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar;$MC_DIR/libraries/com/mojang/brigadier/1.0.17/brigadier-1.0.17.jar;$MC_DIR/libraries/com/mojang/datafixerupper/2.0.24/datafixerupper-2.0.24.jar;$MC_DIR/libraries/com/google/code/gson/gson/2.8.0/gson-2.8.0.jar;$MC_DIR/libraries/com/mojang/authlib/1.5.25/authlib-1.5.25.jar;$MC_DIR/libraries/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar;$MC_DIR/libraries/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar;$MC_DIR/libraries/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar;$MC_DIR/libraries/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar;$MC_DIR/libraries/it/unimi/dsi/fastutil/8.2.1/fastutil-8.2.1.jar;$MC_DIR/libraries/org/apache/logging/log4j/log4j-api/2.8.1/log4j-api-2.8.1.jar;$MC_DIR/libraries/org/apache/logging/log4j/log4j-core/2.8.1/log4j-core-2.8.1.jar;$MC_DIR/libraries/com/mojang/realms/1.14.15/realms-1.14.15.jar;$MC_DIR/libraries/org/lwjgl/lwjgl/3.2.1/lwjgl-3.2.1.jar;$MC_DIR/libraries/org/lwjgl/lwjgl-jemalloc/3.2.1/lwjgl-jemalloc-3.2.1.jar;$MC_DIR/libraries/org/lwjgl/lwjgl-openal/3.2.1/lwjgl-openal-3.2.1.jar;$MC_DIR/libraries/org/lwjgl/lwjgl-opengl/3.2.1/lwjgl-opengl-3.2.1.jar;$MC_DIR/libraries/org/lwjgl/lwjgl-glfw/3.2.1/lwjgl-glfw-3.2.1.jar;$MC_DIR/libraries/org/lwjgl/lwjgl-stb/3.2.1/lwjgl-stb-3.2.1.jar;$MC_DIR/libraries/com/mojang/text2speech/1.11.3/text2speech-1.11.3.jar;$MC_DIR/versions/$VERSION/$VERSION.jar net.minecraft.client.main.Main --username $PLAYER --version $VERSION --accessToken 0 --userProperties {} --gameDir $GAME_DIR --assetsDir $ASSETS_DIR --assetIndex $ASSETS_INDEX --width $WIDTH --height $HEIGHT
+java -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M \
+-Djava.library.path=$NATIVES_DIR \
+-cp $MC_DIR/libraries/com/mojang/datafixerupper/2.0.24/datafixerupper-2.0.24.jar:$MC_DIR/libraries/com/mojang/authlib/1.5.25/authlib-1.5.25.jar:$MC_DIR/libraries/com/mojang/patchy/1.1/patchy-1.1.jar:$MC_DIR/libraries/com/mojang/text2speech/1.11.3/text2speech-1.11.3.jar:$MC_DIR/libraries/com/mojang/text2speech/1.11.3/text2speech-1.11.3-natives-linux.jar:$MC_DIR/libraries/com/mojang/javabridge/1.0.22/javabridge-1.0.22.jar:$MC_DIR/libraries/com/mojang/brigadier/1.0.17/brigadier-1.0.17.jar:$MC_DIR/libraries/com/google/code/gson/gson/2.8.0/gson-2.8.0.jar:$MC_DIR/libraries/com/google/guava/guava/21.0/guava-21.0.jar:$MC_DIR/libraries/com/ibm/icu/icu4j-core-mojang/51.2/icu4j-core-mojang-51.2.jar:$MC_DIR/libraries/io/netty/netty-all/4.1.25.Final/netty-all-4.1.25.Final.jar:$MC_DIR/libraries/org/apache/logging/log4j/log4j-core/2.8.1/log4j-core-2.8.1.jar:$MC_DIR/libraries/org/apache/logging/log4j/log4j-api/2.8.1/log4j-api-2.8.1.jar:$MC_DIR/libraries/org/apache/commons/commons-compress/1.8.1/commons-compress-1.8.1.jar:$MC_DIR/libraries/org/apache/commons/commons-lang3/3.5/commons-lang3-3.5.jar:$MC_DIR/libraries/org/apache/httpcomponents/httpclient/4.3.3/httpclient-4.3.3.jar:$MC_DIR/libraries/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-tinyfd/3.2.2/lwjgl-tinyfd-3.2.2.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-tinyfd/3.2.2/lwjgl-tinyfd-3.2.2-natives-linux.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-opengl/3.2.2/lwjgl-opengl-3.2.2.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-opengl/3.2.2/lwjgl-opengl-3.2.2-natives-linux.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-openal/3.2.2/lwjgl-openal-3.2.2-natives-linux.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-openal/3.2.2/lwjgl-openal-3.2.2.jar:$MC_DIR/libraries/org/lwjgl/lwjgl/3.2.2/lwjgl-3.2.2-natives-linux.jar:$MC_DIR/libraries/org/lwjgl/lwjgl/3.2.2/lwjgl-3.2.2.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-stb/3.2.2/lwjgl-stb-3.2.2.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-stb/3.2.2/lwjgl-stb-3.2.2-natives-linux.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-glfw/3.2.2/lwjgl-glfw-3.2.2-natives-linux.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-glfw/3.2.2/lwjgl-glfw-3.2.2.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-jemalloc/3.2.2/lwjgl-jemalloc-3.2.2-natives-linux.jar:$MC_DIR/libraries/org/lwjgl/lwjgl-jemalloc/3.2.2/lwjgl-jemalloc-3.2.2.jar:$MC_DIR/libraries/it/unimi/dsi/fastutil/8.2.1/fastutil-8.2.1.jar:$MC_DIR/libraries/oshi-project/oshi-core/1.1/oshi-core-1.1.jar:$MC_DIR/libraries/commons-codec/commons-codec/1.10/commons-codec-1.10.jar:$MC_DIR/libraries/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar:$MC_DIR/libraries/net/java/dev/jna/platform/3.4.0/platform-3.4.0.jar:$MC_DIR/libraries/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar:$MC_DIR/libraries/net/java/jutils/jutils/1.0.0/jutils-1.0.0.jar:$MC_DIR/libraries/net/java/jinput/jinput/2.0.5/jinput-2.0.5.jar:$MC_DIR/libraries/net/sf/jopt-simple/jopt-simple/5.0.3/jopt-simple-5.0.3.jar:$MC_DIR/libraries/commons-io/commons-io/2.5/commons-io-2.5.jar:$MC_DIR/versions/$VERSION/$VERSION.jar \
+net.minecraft.client.main.Main net.minecraft.client.main.Main \
+--username $PLAYER \
+--version $VERSION \
+--accessToken 0 --userProperties {} \
+--assetsDir $ASSETS_DIR \
+--assetIndex $ASSETS_INDEX \
+--width $WIDTH --height $HEIGHT