diff --git a/action.yml b/action.yml
index 37b40fc..61895ac 100644
--- a/action.yml
+++ b/action.yml
@@ -89,7 +89,7 @@ runs:
 
     - name: Sign the receipt
       if: ${{ always() && inputs.receipt == 'true' }}
-      uses: actions/attest@v2
+      uses: actions/attest@v4
       with:
         subject-name: gate-integrity
         predicate-type: 'https://modonome.com/attestation/gate-integrity/v1'
@@ -113,7 +113,7 @@ runs:
 
     - name: Sign the AgentProof attestation
       if: ${{ always() && inputs.agentproof == 'true' }}
-      uses: actions/attest@v2
+      uses: actions/attest@v4
       with:
         subject-name: agentproof-conformance
         predicate-type: 'https://modonome.com/attestation/agentproof-conformance/v1'