diff --git a/Dockerfile b/Dockerfile
index 9036f1b..61ee8ec 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,8 +4,8 @@ RUN addgroup minecraft -g 2222
 RUN adduser -u 2222 -h /var/lib/minecraft -D -G minecraft minecraft
 
 ENV VERSION=1.17.1
-ENV SERIAL=157
-ENV SHA256_SUM=862b043fbc0be948c380bced4aee224200568954db941ca6f6ac568cab263991
+ENV SERIAL=400
+ENV SHA256_SUM=3b8ea78e28f5f5224ef692762e36150e16c352e9159f6cb00db466a0de787f38
 RUN wget -O /var/lib/minecraft/paper.jar \
 	https://papermc.io/api/v2/projects/paper/versions/$VERSION/builds/$SERIAL/downloads/paper-$VERSION-$SERIAL.jar 
 
@@ -14,8 +14,8 @@ RUN echo "$SHA256_SUM  /var/lib/minecraft/paper.jar" | sha256sum -c - || exit 1
 RUN apk add --no-cache \
     openssl
 
-RUN apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
-    openjdk16-jre-headless
+RUN apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community \
+    openjdk17-jre-headless
 
 RUN mkdir -p /etc/services.d/minecraft/