diff --git a/.changeset/old-cycles-invite.md b/.changeset/old-cycles-invite.md
new file mode 100644
index 0000000000000..d05596e7bedf7
--- /dev/null
+++ b/.changeset/old-cycles-invite.md
@@ -0,0 +1,5 @@
+---
+"@eth-optimism/contracts": patch
+---
+
+Makes ProxyEOA compatible with EIP1967, not backwards compatible since the storage slot changes.
diff --git a/packages/contracts/contracts/optimistic-ethereum/OVM/accounts/OVM_ProxyEOA.sol b/packages/contracts/contracts/optimistic-ethereum/OVM/accounts/OVM_ProxyEOA.sol
index 02d809b717a6e..d158d15d5b4e5 100644
--- a/packages/contracts/contracts/optimistic-ethereum/OVM/accounts/OVM_ProxyEOA.sol
+++ b/packages/contracts/contracts/optimistic-ethereum/OVM/accounts/OVM_ProxyEOA.sol
@@ -16,12 +16,21 @@ import { Lib_Bytes32Utils } from "../../libraries/utils/Lib_Bytes32Utils.sol";
  */
 contract OVM_ProxyEOA {
 
+    /**********
+     * Events *
+     **********/
+    
+    event Upgraded(
+        address indexed implementation
+    );
+
+
     /*************
      * Constants *
      *************/
 
     address constant DEFAULT_IMPLEMENTATION = 0x4200000000000000000000000000000000000003;
-    bytes32 constant IMPLEMENTATION_KEY = 0xdeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddead;
+    bytes32 constant IMPLEMENTATION_KEY = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; //bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1);
 
 
     /*********************
@@ -68,6 +77,7 @@ contract OVM_ProxyEOA {
         );
 
         _setImplementation(_implementation);
+        emit Upgraded(_implementation);
     }
 
     /**
diff --git a/packages/contracts/test/contracts/OVM/accounts/OVM_ProxyEOA.spec.ts b/packages/contracts/test/contracts/OVM/accounts/OVM_ProxyEOA.spec.ts
index 2d9f00f9939dc..b292372f50243 100644
--- a/packages/contracts/test/contracts/OVM/accounts/OVM_ProxyEOA.spec.ts
+++ b/packages/contracts/test/contracts/OVM/accounts/OVM_ProxyEOA.spec.ts
@@ -94,7 +94,7 @@ describe('OVM_ProxyEOA', () => {
   })
   describe('upgrade()', () => {
     const implSlotKey =
-      '0xdeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddeaddead'
+      '0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc' //bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)
     it(`should upgrade the proxy implementation`, async () => {
       const newImpl = `0x${'81'.repeat(20)}`
       const newImplBytes32 = addrToBytes32(newImpl)