diff --git a/codex/contracts/market.nim b/codex/contracts/market.nim
index 3ca0d0e63..1b87d4b19 100644
--- a/codex/contracts/market.nim
+++ b/codex/contracts/market.nim
@@ -260,7 +260,8 @@ method canReserveSlot*(
   requestId: RequestId,
   slotIndex: UInt256): Future[bool] {.async.} =
 
-  await market.contract.canReserveSlot(requestId, slotIndex)
+  convertEthersError:
+    return await market.contract.canReserveSlot(requestId, slotIndex)
 
 method subscribeRequests*(market: OnChainMarket,
                          callback: OnRequest):
diff --git a/vendor/codex-contracts-eth b/vendor/codex-contracts-eth
index 33010bd20..807fc973c 160000
--- a/vendor/codex-contracts-eth
+++ b/vendor/codex-contracts-eth
@@ -1 +1 @@
-Subproject commit 33010bd20cfdc3d589be25782052796af580ca83
+Subproject commit 807fc973c875b5bde8f517c71c818ba8f2f720dd