diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7dfe9552..4c3d8bde 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,7 +19,7 @@ jobs:
       - name: "setup go"
         uses: "actions/setup-go@v3"
         with:
-          go-version: "1.20"
+          go-version: "1.21"
       - name: "install python3-pytest"
         run: "sudo apt install -y python3-pytest"
       - name: "make install"
diff --git a/Dockerfile b/Dockerfile
index 06cc93f1..5eaec3ec 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ## build ergo binary
-FROM golang:1.20-alpine AS build-env
+FROM golang:1.21-alpine AS build-env
 
 RUN apk upgrade -U --force-refresh --no-cache && apk add --no-cache --purge --clean-protected -l -u make git
 
diff --git a/go.mod b/go.mod
index 73fedb42..90422a6a 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/ergochat/ergo
 
-go 1.20
+go 1.21
 
 require (
 	code.cloudfoundry.org/bytefmt v0.0.0-20200131002437-cf55d5288a48