diff --git a/.github/actions/setup-opencode/action.yml b/.github/actions/setup-opencode/action.yml
index 9dec10d46f..bad099fa72 100644
--- a/.github/actions/setup-opencode/action.yml
+++ b/.github/actions/setup-opencode/action.yml
@@ -7,8 +7,8 @@ runs:
     - name: Download and verify OpenCode
       shell: bash
       env:
-        OPENCODE_VERSION: v1.17.7
-        OPENCODE_SHA256: 60fe5a92dc9af64ec079348fedde17e12da6a867efe7e8353be8038480607924
+        OPENCODE_VERSION: v1.18.0
+        OPENCODE_SHA256: a46af88b710248cc55719abd7f8fb482030494d6c9ed63f37aae7c6d6af4fc90
       run: |
         set -euo pipefail
 
diff --git a/.github/scripts/pr-walkthrough-workflow-contract_test.py b/.github/scripts/pr-walkthrough-workflow-contract_test.py
index 3eb6fe7ff2..cfcb1dff58 100644
--- a/.github/scripts/pr-walkthrough-workflow-contract_test.py
+++ b/.github/scripts/pr-walkthrough-workflow-contract_test.py
@@ -378,8 +378,9 @@ class PRWalkthroughWorkflowContractTest(unittest.TestCase):
         self.assertNotIn("curl -fsSL", workflows)
         self.assertTrue(SETUP_OPENCODE_ACTION.is_file())
         action = SETUP_OPENCODE_ACTION.read_text(encoding="utf-8")
+        self.assertIn("OPENCODE_VERSION: v1.18.0", action)
         self.assertIn(
-            "60fe5a92dc9af64ec079348fedde17e12da6a867efe7e8353be8038480607924",
+            "a46af88b710248cc55719abd7f8fb482030494d6c9ed63f37aae7c6d6af4fc90",
             action,
         )