diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb18f639..925a8fc7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,10 +38,10 @@ jobs:
       matrix:
         stable: [true]
         crystal:
-          - 1.7.3
-          - 1.8.2
           - 1.9.2
           - 1.10.1
+          - 1.11.2
+          - 1.12.1
         include:
           - crystal: nightly
             stable: false
diff --git a/docker/Dockerfile b/docker/Dockerfile
index ace096bf..3d9323fd 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM crystallang/crystal:1.8.2-alpine AS builder
+FROM crystallang/crystal:1.12.1-alpine AS builder
 
 RUN apk add --no-cache sqlite-static yaml-static
 
diff --git a/docker/Dockerfile.arm64 b/docker/Dockerfile.arm64
index 602f3ab2..f054b326 100644
--- a/docker/Dockerfile.arm64
+++ b/docker/Dockerfile.arm64
@@ -1,5 +1,5 @@
-FROM alpine:3.18 AS builder
-RUN apk add --no-cache 'crystal=1.8.2-r0' shards sqlite-static yaml-static yaml-dev libxml2-static zlib-static openssl-libs-static openssl-dev musl-dev xz-static
+FROM alpine:3.19 AS builder
+RUN apk add --no-cache 'crystal=1.10.1-r0' shards sqlite-static yaml-static yaml-dev libxml2-static zlib-static openssl-libs-static openssl-dev musl-dev xz-static
 
 ARG release