diff --git a/Dockerfile b/Dockerfile
index 75d30b6..1d259ec 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,4 @@
-# pinning, because AWS lightsail AMIs don't support openssh 9+ yet
-FROM ruby@sha256:54d09dd38d80d8b850fbff21425d9bd159f9ff7e1de1cdbcbb0b7745f5049784
+FROM ruby:3.1-slim
 
 RUN apt-get -qq update && apt-get -qq -y install openssh-client git >/dev/null
 WORKDIR /app
diff --git a/lib/pull_preview/providers/lightsail.rb b/lib/pull_preview/providers/lightsail.rb
index 139ce71..fc39d97 100644
--- a/lib/pull_preview/providers/lightsail.rb
+++ b/lib/pull_preview/providers/lightsail.rb
@@ -148,7 +148,7 @@ def availability_zones
       def blueprint_id
         blueprint_id = client.get_blueprints.blueprints.find do |blueprint|
           blueprint.platform == "LINUX_UNIX" &&
-            blueprint.group == "amazon_linux_2" &&
+            blueprint.group == "amazon_linux_2023" &&
             blueprint.is_active &&
             blueprint.type == "os"
         end.blueprint_id