diff --git a/docker/Dockerfile b/docker/Dockerfile
index 4a20719e..f5f4322d 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM mirror.gcr.io/crystallang/crystal:1.14.0-alpine AS builder
+FROM mirror.gcr.io/crystallang/crystal:1.15.1-alpine AS builder
 
 RUN apk add --no-cache sqlite-static yaml-static