diff --git a/kiichain/proposals/proposal_12.json b/kiichain/proposals/proposal_12.json
index 3cdea38..e320da7 100644
--- a/kiichain/proposals/proposal_12.json
+++ b/kiichain/proposals/proposal_12.json
@@ -1,20 +1,20 @@
 {
     "messages": [
         {
-            "@type": "/cosmos.upgrade.v1beta1.MsgSoftwareUpgrade",
+            "@type": "/cosmos.evm.vm.v1.MsgRegisterPreinstalls",
             "authority": "kii10d07y265gmmuvt4z0w9aw880jnsr700jrff0qv",
-            "plan": {
-                "name": "v7.4.2",
-                "time": "0001-01-01T00:00:00Z",
-                "height": "10011200",
-                "info": "",
-                "upgraded_client_state": null
-            }
+            "preinstalls": [
+                {
+                    "name": "Arachnid Deterministic Deployment Proxy",
+                    "address": "0x4e59b44847b379578588920ca78fbf26c0b4956c",
+                    "code": "0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe03601600081602082378035828234f58015156039578182fd5b80825250506014600cf3"
+                }
+            ]
         }
     ],
     "metadata": "ipfs://CID",
-    "deposit": "3500000000000000000000akii",
-    "title": "Upgrade Kiichain to v7.4.2",
-    "summary": "Coordinated upgrade of Kiichain mainnet to v7.4.2.\n\nThe upgrade is scheduled for Monday 2026-09-14 around 17:00:00 UTC (block height 10,011,200).\n\nValidators should download the v7.4.2 binary, verify the checksum, and stage it in cosmovisor under the upgrade plan name v7.4.2 before the upgrade height.\n\nBinaries:\n- linux/amd64: https://kiichain-snapshots-public.s3.us-east-2.amazonaws.com/releases/v7.4.2/kiichaind-v7.4.2-linux-amd64\n  sha256: e99e145379c65b9a1b8dae1a799d9a359a16740c07d0c3684820e6729ab34513\n- linux/arm64: https://kiichain-snapshots-public.s3.us-east-2.amazonaws.com/releases/v7.4.2/kiichaind-v7.4.2-linux-arm64\n  sha256: 22df50464e13a69436213e54069eec26fe6468f2e88d0eb80e877bd883b63d49\n\nThis release updates CosmWasm dependencies and includes a no-op upgrade handler for plan name v7.4.2.",
-    "expedited": true
+    "deposit": "20000000000000000000000akii",
+    "title": "Register Arachnid Deterministic Deployment Proxy",
+    "summary": "Preinstall Arachnid's CREATE2 factory at the canonical address 0x4e59b44847b379578588920ca78fbf26c0b4956c.\n\nThis is the standard deterministic deployment proxy used across EVM networks. Registering it via governance enables CREATE2 deployments at the same addresses as Ethereum (including the canonical ERC-4337 EntryPoint v0.7).\n\nVerified on Plata (devnet) before this mainnet proposal.",
+    "expedited": false
 }