diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 0c2948a..8af4d0d 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -36,6 +36,13 @@ jobs:
           # a pull request then we can check out the head.
           fetch-depth: 2
 
+      # GH Actions runner uses go1.20 by default, so we need to install our own version.
+      # https://github.com/github/codeql-action/issues/1842#issuecomment-1704398087
+      - name: Install Go from go.mod
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
       # If this run was triggered by a pull request event, then checkout
       # the head of the pull request instead of the merge commit.
       - run: git checkout HEAD^2
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1e07c54..82d54bb 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,9 +21,9 @@ jobs:
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v5.0.0
+        uses: actions/setup-go@v5
         with:
-          go-version: 1.19
+          go-version-file: go.mod
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v5.0.0
         with:
diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 0175552..4614d82 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -38,16 +38,15 @@ jobs:
     needs: [yamllint, asknancy]
     strategy:
       matrix:
-        go-version: [1.19.x]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - name: Install Go ${{ matrix.go-version }}
-        uses: actions/setup-go@v5.0.0
-        with:
-          go-version: ${{ matrix.go-version }}
       - name: Checkout code
         uses: actions/checkout@v4
+      - name: Install Go from go.mod
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
       - name: Cache code
         uses: actions/cache@v3
         with:
diff --git a/go.mod b/go.mod
index d40b600..7b34637 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/BuxOrg/go-buxclient
 
-go 1.19
+go 1.21
 
 require (
 	github.com/BuxOrg/bux-models v0.2.1
diff --git a/go.sum b/go.sum
index 4c4985b..678792e 100644
--- a/go.sum
+++ b/go.sum
@@ -7,7 +7,9 @@ github.com/bitcoinsv/bsvd v0.0.0-20190609155523-4c29707f7173/go.mod h1:BZ1UcC9+t
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/libsv/go-bk v0.1.6 h1:c9CiT5+64HRDbzxPl1v/oiFmbvWZTuUYqywCf+MBs/c=
 github.com/libsv/go-bk v0.1.6/go.mod h1:khJboDoH18FPUaZlzRFKzlVN84d4YfdmlDtdX4LAjQA=
 github.com/libsv/go-bt/v2 v2.2.5 h1:VoggBLMRW9NYoFujqe5bSYKqnw5y+fYfufgERSoubog=
@@ -21,11 +23,13 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
+github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k=
 golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=