diff --git a/Dockerfile b/Dockerfile
index 4193b2e..04409db 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM openjdk:11
+FROM openjdk:22-slim
 
 COPY entrypoint.sh /script/entrypoint.sh
 
diff --git a/entrypoint.sh b/entrypoint.sh
index 4b211b5..165de42 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+apt-get update
+apt-get install wget -y
+
 wget https://www.antlr.org/download/antlr-4.9.2-complete.jar
 export CLASSPATH=".:./antlr-4.9.2-complete.jar:$CLASSPATH"