diff --git a/Containerfile b/Containerfile
index b48b0b2..7e7f3a2 100644
--- a/Containerfile
+++ b/Containerfile
@@ -3,9 +3,9 @@ FROM docker.io/thallian/confd-env:3.20-3.1.6.2
 RUN addgroup minecraft -g 2222
 RUN adduser -u 2222 -h /var/lib/minecraft -D -G minecraft minecraft
 
-ENV VERSION=1.20.6
-ENV SERIAL=147
-ENV SHA256_SUM=24c58de34153160f3b466c70c94afcec9b3d2b20a6681863e839df7b7bdb9594
+ENV VERSION=1.21
+ENV SERIAL=124
+ENV SHA256_SUM=0620f678aeb1581a20c191621b427c10b4f0d86e18bf04955fdc44ff9bdc758f
 RUN wget -O /var/lib/minecraft/paper.jar \
   https://papermc.io/api/v2/projects/paper/versions/$VERSION/builds/$SERIAL/downloads/paper-$VERSION-$SERIAL.jar