diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ee2a5295c4..1248fea0f9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -154,7 +154,7 @@ jobs:
     container:
       # Whenever the Go version is updated here, .promu.yml
       # should also be updated.
-      image: quay.io/prometheus/golang-builder:1.25-base
+      image: quay.io/prometheus/golang-builder:1.26-base
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with: