diff --git a/packages/subgraph-service/contracts/utilities/AllocationManager.sol b/packages/subgraph-service/contracts/utilities/AllocationManager.sol
index 2e40f28d3..a6b719df4 100644
--- a/packages/subgraph-service/contracts/utilities/AllocationManager.sol
+++ b/packages/subgraph-service/contracts/utilities/AllocationManager.sol
@@ -30,7 +30,7 @@ abstract contract AllocationManager is EIP712Upgradeable, GraphDirectory, Alloca
     using TokenUtils for IGraphToken;
 
     ///@dev EIP712 typehash for allocation proof
-    bytes32 private immutable EIP712_ALLOCATION_PROOF_TYPEHASH =
+    bytes32 private constant EIP712_ALLOCATION_PROOF_TYPEHASH =
         keccak256("AllocationIdProof(address indexer,address allocationId)");
 
     /**