diff --git a/.github/workflows/go_test.yml b/.github/workflows/go_test.yml
index dfd6998..44e471d 100644
--- a/.github/workflows/go_test.yml
+++ b/.github/workflows/go_test.yml
@@ -6,7 +6,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.19.x, 1.20.x]
+        go-version: [1.21.x, 1.22.x]
         os: [ubuntu-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index d9e94cc..ddca027 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: 1.19
+          go-version: 1.22
       - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
       - name: golangci-lint
         uses: golangci/golangci-lint-action@3a919529898de77ec3da873e3063ca4b10e7f5cc # v3.7.0
diff --git a/go.mod b/go.mod
index f0a4e38..6c035a1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/transparency-dev/armored-witness-common
 
-go 1.20
+go 1.22.4
 
 require (
 	github.com/coreos/go-semver v0.3.1
diff --git a/go.sum b/go.sum
index 058b566..c7534bb 100644
--- a/go.sum
+++ b/go.sum
@@ -5,6 +5,7 @@ github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ4
 github.com/golang/mock v1.6.0 h1:ErTB+efbowRARo13NNdxyJji2egdxLGQhRaY+DUumQc=
 github.com/golang/mock v1.6.0/go.mod h1:p6yTPP+5HYm5mzsMV8JkE6ZKdX+/wYM6Hr+LicevLPs=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/transparency-dev/formats v0.0.0-20230920083814-0f75b1d4e813 h1:PHklaeYyhPsbhWt+MnKpBvJrsJGkPEaU1JutMj4wNqM=
 github.com/transparency-dev/formats v0.0.0-20230920083814-0f75b1d4e813/go.mod h1:J2NdDb6IhKIvF6MwCvKikz9/QStRylEtS2mv+En+jBg=
 github.com/transparency-dev/merkle v0.0.2 h1:Q9nBoQcZcgPamMkGn7ghV8XiTZ/kRxn1yCG81+twTK4=