diff --git a/Dockerfile b/Dockerfile
index f43adb0..c1f56f2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,17 +3,16 @@ FROM centos:7
 ###############################################
 ## install jdk
 ###############################################
-ARG JAVA_FILE=jdk-8u321-linux-x64.rpm
+ARG JAVA_FILE=openjdk-21_linux-x64_bin.tar.gz
 
-COPY ./depends/${JAVA_FILE} /tmp/jdk-8-linux-x64.rpm
-RUN yum -y install /tmp/jdk-8-linux-x64.rpm
-# JDK stripping
-RUN rm -f /usr/java/jdk1.8.0_321-amd64/src.zip /usr/java/jdk1.8.0_321-amd64/javafx-src.zip
-RUN rm -rf /usr/java/jdk1.8.0_321-amd64/lib/missioncontrol/ /usr/java/jdk1.8.0_321-amd64/lib/visualvm/ /usr/java/jdk1.8.0_321-amd64/db/
-RUN alternatives --install /usr/bin/java java /usr/java/latest/bin/java 1
-RUN alternatives --install /usr/bin/javac javac /usr/java/latest/bin/javac 1
-ENV JAVA_HOME /usr/java/latest
-RUN rm -f /tmp/jdk-8-linux-x64.rpm;
+COPY ./depends/${JAVA_FILE} /tmp/openjdk-21_linux-x64_bin.tar.gz
+
+RUN mkdir -p /usr/local/java
+RUN tar -zxf /tmp/openjdk-21_linux-x64_bin.tar.gz --strip-components 1 -C /usr/local/java
+ENV JAVA_HOME /usr/local/java
+ENV PATH $PATH:$JAVA_HOME/bin
+
+RUN rm -f /tmp/openjdk-21_linux-x64_bin.tar.gz;
 RUN java -version
 
 ###############################################
@@ -53,18 +52,18 @@ RUN cnpm -v
 ENV FPM_VERSION 1.14.0
 RUN yum install -y centos-release-scl
 
-RUN yum install -y rh-ruby25 rh-ruby25-rubygems rh-ruby25-ruby-devel gcc make rpm-build
-RUN echo '/opt/rh/rh-ruby25/root/usr/lib64' > /etc/ld.so.conf.d/rh-ruby.conf
+RUN yum install -y rh-ruby26 rh-ruby26-rubygems rh-ruby26-ruby-devel gcc make rpm-build
+RUN echo '/opt/rh/rh-ruby26/root/usr/lib64' > /etc/ld.so.conf.d/rh-ruby.conf
 RUN ldconfig
-RUN ln -s /opt/rh/rh-ruby25/root/bin/ruby /usr/bin/ruby \
-  && ln -s /opt/rh/rh-ruby25/root/bin/gem /usr/bin/gem
+RUN ln -s /opt/rh/rh-ruby26/root/bin/ruby /usr/bin/ruby \
+  && ln -s /opt/rh/rh-ruby26/root/bin/gem /usr/bin/gem
 
 RUN ruby -v
 
 RUN gem sources --add http://mirrors.aliyun.com/rubygems/ \
   && gem sources --remove https://rubygems.org/ \
   && gem install fpm -v ${FPM_VERSION} \
-  && ln -s /opt/rh/rh-ruby25/root/usr/local/bin/fpm /usr/bin/fpm
+  && ln -s /opt/rh/rh-ruby26/root/usr/local/bin/fpm /usr/bin/fpm
 
 RUN fpm -v
 
diff --git a/depends/openjdk-21_linux-x64_bin.tar.gz b/depends/openjdk-21_linux-x64_bin.tar.gz
new file mode 100644
index 0000000..cdabd4f
Binary files /dev/null and b/depends/openjdk-21_linux-x64_bin.tar.gz differ