diff --git a/Dockerfile b/Dockerfile
index 1b8a4f8..75e29d4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.20 as builder
+FROM golang:1.21 as builder
 COPY . /castor
 RUN cd /castor && CGO_ENABLED=0 go build