diff --git a/Dockerfile b/Dockerfile
index 67b6192..a21cefa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # Pinning, because Amazon Linux 2 doesn't support openssh 9+ clients yet, and we need to maintain compatibility with older pullpreview instances.
 # FIXME: Switch back to ruby@3.1-slim after end of august 2023, when we can be sure that newer instances have been created with Amazon Linux 2023.
-FROM ruby@sha256:54d09dd38d80d8b850fbff21425d9bd159f9ff7e1de1cdbcbb0b7745f5049784
+FROM ruby@sha256:2704d8eede6d399b07e5475cae41f7e7077edd9e970753f543ddb445f7f0424f
 
 RUN apt-get -qq update && apt-get -qq -y install openssh-client git >/dev/null
 WORKDIR /app