diff --git a/Containerfile b/Containerfile
index 7dcd2c7..e0202a7 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,4 +1,4 @@
-FROM docker.io/alpine:3.20 AS builder
+FROM docker.io/alpine:3.21 AS builder
 
 RUN apk add --no-cache \
   alpine-sdk \
@@ -14,7 +14,7 @@ RUN apk add --no-cache \
   poetry \
   git
 
-ENV VERSION=v1.120.0
+ENV VERSION=v1.121.1
 RUN git clone https://github.com/element-hq/synapse.git
 WORKDIR /synapse
 RUN git checkout $VERSION
@@ -24,7 +24,7 @@ RUN pip3 install --target="/install" -r /synapse/requirements.txt
 RUN pip3 install --target="/install" --no-deps --no-warn-script-location /synapse[all];
 
 
-FROM docker.io/thallian/confd-env:3.20-3.1.6.2
+FROM docker.io/thallian/confd-env:3.21-3.2.0.2
 
 RUN addgroup -g 2222 matrix-synapse
 RUN adduser -h /var/lib/matrix-synapse -u 2222 -D -G matrix-synapse matrix-synapse