diff --git a/.github/workflows/docker-registry-v2-tests.yml b/.github/workflows/docker-registry-v2-tests.yml
index a6a243b..ac9956c 100644
--- a/.github/workflows/docker-registry-v2-tests.yml
+++ b/.github/workflows/docker-registry-v2-tests.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v3.1.0
       - uses: actions/setup-go@v3.3.0
         with:
-          go-version: '1.20'
+          go-version: '1.21'
           check-latest: true
       - name: Install Cosign
         uses: sigstore/cosign-installer@main
diff --git a/.github/workflows/e2e-with-binary.yml b/.github/workflows/e2e-with-binary.yml
index 1668e55..854f095 100644
--- a/.github/workflows/e2e-with-binary.yml
+++ b/.github/workflows/e2e-with-binary.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v3.1.0
       - uses: actions/setup-go@v3.3.0
         with:
-          go-version: '1.20'
+          go-version: '1.21'
           check-latest: true
       - name: build sigscan and check
         shell: bash
diff --git a/.github/workflows/oras-registry-tests.yml b/.github/workflows/oras-registry-tests.yml
index 56c5a03..b83fb0e 100644
--- a/.github/workflows/oras-registry-tests.yml
+++ b/.github/workflows/oras-registry-tests.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v3.1.0
       - uses: actions/setup-go@v3.3.0
         with:
-          go-version: '1.20'
+          go-version: '1.21'
           check-latest: true
       - name: Install Cosign
         uses: sigstore/cosign-installer@main
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 5cad260..6a556cb 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -25,7 +25,7 @@ jobs:
       - name: Install Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - uses: actions/checkout@v3
       - name: Go Build
         run: make sigscan && mv ./sigscan ./${{ matrix.SIGSCAN_TARGET }}
diff --git a/.github/workflows/zot-registry-tests.yml b/.github/workflows/zot-registry-tests.yml
index ed46315..be99072 100644
--- a/.github/workflows/zot-registry-tests.yml
+++ b/.github/workflows/zot-registry-tests.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v3.1.0
       - uses: actions/setup-go@v3.3.0
         with:
-          go-version: '1.20'
+          go-version: '1.21'
           check-latest: true
       - name: Install Cosign
         uses: sigstore/cosign-installer@main