diff --git a/ct/booklore.sh b/ct/booklore.sh
index 5ece76d3aa..48e19d6b59 100644
--- a/ct/booklore.sh
+++ b/ct/booklore.sh
@@ -45,7 +45,7 @@ function update_script() {
     $STD npm run build --configuration=production
     msg_ok "Built Frontend"
 
-    JAVA_VERSION="25" setup_java
+    JAVA_VERSION="21" setup_java
 
     msg_info "Building Backend"
     cd /opt/booklore/booklore-api
diff --git a/install/booklore-install.sh b/install/booklore-install.sh
index fa506675dd..b68e28ceb9 100644
--- a/install/booklore-install.sh
+++ b/install/booklore-install.sh
@@ -18,7 +18,7 @@ $STD apt-get install -y nginx
 msg_ok "Installed Dependencies"
 
 fetch_and_deploy_gh_release "booklore" "booklore-app/BookLore"
-JAVA_VERSION="25" setup_java
+JAVA_VERSION="21" setup_java
 NODE_VERSION="22" setup_nodejs
 setup_mariadb
 setup_yq