diff --git a/.bazelversion b/.bazelversion
index 6da4de5..f7ee066 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-8.4.1
+9.0.0
diff --git a/.github/workflows/ci-cpp-build-gnmi.yml b/.github/workflows/ci-cpp-build-gnmi.yml
index e2f8722..a9a4bb9 100644
--- a/.github/workflows/ci-cpp-build-gnmi.yml
+++ b/.github/workflows/ci-cpp-build-gnmi.yml
@@ -17,7 +17,7 @@ jobs:
         with:
           submodules: recursive
       - name: Mount bazel cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: "~/.cache/bazel"
           key: bazel-${{ runner.os }}-build-${{ hashFiles('**/*.bzl', '**/*.bazel') }}
diff --git a/go.mod b/go.mod
index 2ad6492..06914d5 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,8 @@ toolchain go1.25.1
 
 require (
 	bitbucket.org/creachadair/stringset v0.0.14
-	github.com/cenkalti/backoff/v4 v4.3.0
+	github.com/cenkalti/backoff/v4 v4.1.1
+	github.com/cenkalti/backoff/v5 v5.0.3
 	github.com/golang/glog v1.2.5
 	github.com/google/go-cmp v0.7.0
 	github.com/kylelemons/godebug v1.1.0
diff --git a/go.sum b/go.sum
index 4f5138b..c5ee4a9 100644
--- a/go.sum
+++ b/go.sum
@@ -5,9 +5,11 @@ cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
+github.com/cenkalti/backoff/v4 v4.1.1 h1:G2HAfAmvm/GcKan2oOQpBXOd2tT2G57ZnZGWa1PxPBQ=
 github.com/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
 github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
+github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=