diff --git a/Dockerfile b/Dockerfile
index 6c4dbd677..d4e71e69a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Builder
-FROM gradle:jdk17-alpine as builder
+FROM gradle:jdk21-alpine as builder
 
 RUN apk add --update nodejs npm
 
@@ -19,7 +19,7 @@ WORKDIR /app
 RUN git clone --branch ${DATA_BRANCH} --depth 1 ${DATA_REPOSITORY}
 
 # Result Container
-FROM amazoncorretto:17-alpine
+FROM amazoncorretto:21-alpine
 
 WORKDIR /app
 
diff --git a/build.gradle b/build.gradle
index 5b04cf045..6030438d8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -54,10 +54,10 @@ compileJava.options.encoding = 'UTF-8'
 compileTestJava.options.encoding = 'UTF-8'
 
 sourceCompatibility = JavaVersion.VERSION_21
-targetCompatibility = JavaVersion.VERSION_17
+targetCompatibility = JavaVersion.VERSION_21
 
 group = 'io.grasscutter'
-version = '1.7.4'
+version = '1.7.5-dev'
 
 java {
     withJavadocJar()