diff --git a/android/Dockerfile b/android/Dockerfile
index 8f7fe13..959addd 100644
--- a/android/Dockerfile
+++ b/android/Dockerfile
@@ -1,10 +1,13 @@
 FROM debian:bookworm
 
 RUN apt-get update && apt-get install -y apt-utils software-properties-common
-RUN apt-get install -y ruby wget libxdamage1 libgl1-mesa-glx libpulse0 locales unzip openjdk-21-jdk curl qrencode git && \
+RUN apt-get install -y ruby wget libxdamage1 libgl1-mesa-glx libpulse0 locales unzip curl qrencode git && \
     apt-get autoremove -y && apt-get autoclean && apt-get clean && \
     rm -rf /tmp/* /var/tmp/* /var/lib/apt/lists/*
 
+RUN cd /tmp/ && wget https://download.java.net/java/GA/jdk21.0.2/f2283984656d49d69e91c558476027ac/13/GPL/openjdk-21.0.2_linux-x64_bin.tar.gz && \
+	tar xf openjdk-21.0.2_linux-x64_bin.tar.gz && mv jdk-21.0.2 /usr/local/jdk-21 && rm openjdk-21.0.2_linux-x64_bin.tar.gz
+
 RUN mkdir /opt/android-sdk-linux && \
     cd /opt/android-sdk-linux && \
     wget --output-document=android-sdk.zip https://dl.google.com/android/repository/commandlinetools-linux-9477386_latest.zip && \
@@ -17,7 +20,8 @@ RUN mkdir /opt/android-sdk-linux && \
 ENV SHELL /bin/bash
 ENV ANDROID_HOME=/opt/android-sdk-linux/
 ENV ANDROID_SDK_ROOT=/opt/android-sdk-linux/
-ENV PATH=$PATH:/opt/android-sdk-linux/cmdline-tools/latest/bin/:/opt/android-sdk-linux/emulator/:/opt/android-sdk-linux/platform-tools/
+ENV PATH=$PATH:/opt/android-sdk-linux/cmdline-tools/latest/bin/:/opt/android-sdk-linux/emulator/:/opt/android-sdk-linux/platform-tools/:/usr/local/jdk-21/bin
+ENV JAVA_HOME=/usr/local/jdk-21
 
 RUN echo en_US.UTF-8 UTF-8 >> /etc/locale.gen
 RUN locale-gen && update-locale LANG=en_US.UTF-8