diff --git a/waterfall/Dockerfile b/waterfall/Dockerfile
index f2660de..290bc64 100644
--- a/waterfall/Dockerfile
+++ b/waterfall/Dockerfile
@@ -10,7 +10,7 @@ COPY utils/waterfall.sh /waterfall/
 RUN sh /waterfall/waterfall.sh "${WATERFALL_VERSION}"
 # ---
 # ---
-FROM docker.io/eclipse-temurin:17
+FROM docker.io/eclipse-temurin:21
 EXPOSE 25565
 ARG TARGETPLATFORM
 ARG TARGETOS