diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index d151b35d..96ecf016 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -52,10 +52,10 @@ jobs:
         uses: vazco/github-actions-branch-name@v1
         id: branch
 
-      - name: Set up Go 1.21
+      - name: Set up Go 1.19
         uses: actions/setup-go@v4
         with:
-          go-version: 1.21.x
+          go-version: 1.19.x
         id: go
 
       - name: Downloads golang mods
diff --git a/Dockerfile b/Dockerfile
index fe830425..75653957 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ ARG RUNTIME_IMAGE=alpine:3.19
 #  cache sharing of the go mod download step.
 # Go cross compilation is also faster than emulation the go compilation across
 #  multiple platforms.
-FROM --platform=${BUILDPLATFORM} golang:1.21 AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.19-buster AS builder
 
 # Copy sources
 WORKDIR $GOPATH/src/github.com/oauth2-proxy/oauth2-proxy