diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 24baae4d81..a8409001fd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -67,7 +67,7 @@ jobs:
       GOTOOLCHAIN: local
     container:
       # The go version in this image should be N-1 wrt test_go.
-      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:
@@ -140,7 +140,7 @@ 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: