diff --git a/.github/workflows/boulder-ci.yml b/.github/workflows/boulder-ci.yml
index 58444e9f5aa..2cb149d6b65 100644
--- a/.github/workflows/boulder-ci.yml
+++ b/.github/workflows/boulder-ci.yml
@@ -36,8 +36,8 @@ jobs:
       matrix:
         # Add additional docker image tags here and all tests will be run with the additional image.
         BOULDER_TOOLS_TAG:
-          - go1.25.5_2025-12-03
-          - go1.25.7_2026-02-04
+          - go1.25.8_2026-03-09
+          - go1.26.1_2026-03-09
         # Tests command definitions. Use the entire "docker compose" command you want to run.
         tests:
           # Run ./test.sh --help for a description of each of the flags.
@@ -130,7 +130,7 @@ jobs:
       # When set to true, GitHub cancels all in-progress jobs if any matrix job fails. Default: true
       fail-fast: false
       matrix:
-        go-version: [ '1.25.7' ]
+        go-version: [ '1.26.1' ]
 
     steps:
       # Checks out your repository under $GITHUB_WORKSPACE, so your job can access it
diff --git a/docker-compose.yml b/docker-compose.yml
index c5c2c472afb..8c2f6e00b26 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,7 +8,7 @@ services:
       context: test/boulder-tools/
       # Should match one of the GO_CI_VERSIONS in test/boulder-tools/tag_and_upload.sh.
       args:
-        GO_VERSION: 1.25.7
+        GO_VERSION: 1.26.1
     environment:
       # To solve HTTP-01 and TLS-ALPN-01 challenges, change the IP in FAKE_DNS
       # to the IP address where your ACME client's solver is listening. This is
diff --git a/test/boulder-tools/tag_and_upload.sh b/test/boulder-tools/tag_and_upload.sh
index b7ff2d7a17c..198e6905584 100755
--- a/test/boulder-tools/tag_and_upload.sh
+++ b/test/boulder-tools/tag_and_upload.sh
@@ -12,7 +12,7 @@ DOCKER_REPO="letsencrypt/boulder-tools"
 # .github/workflows/release.yml,
 # .github/workflows/try-release.yml if appropriate,
 # and .github/workflows/boulder-ci.yml with the new container tag.
-GO_CI_VERSIONS=( "1.25.5" "1.25.7" )
+GO_CI_VERSIONS=( "1.25.8" "1.26.1" )
 
 echo "Please login to allow push to DockerHub"
 docker login