diff --git a/app/app.go b/app/app.go
index 64169ff2f..9386de8da 100644
--- a/app/app.go
+++ b/app/app.go
@@ -26,6 +26,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/store/streaming"
 	storetypes "github.com/cosmos/cosmos-sdk/store/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/mempool"
 	"github.com/cosmos/cosmos-sdk/types/module"
 	"github.com/cosmos/cosmos-sdk/version"
 	"github.com/cosmos/cosmos-sdk/x/auth/ante"
@@ -227,6 +228,15 @@ func NewIrisApp(
 	legacyAmino := encodingConfig.Amino
 	interfaceRegistry := encodingConfig.InterfaceRegistry
 
+	// Setup Mempool
+	baseAppOptions = append(baseAppOptions, func(app *baseapp.BaseApp) {
+		memPool := mempool.NoOpMempool{}
+		app.SetMempool(memPool)
+		handler := baseapp.NewDefaultProposalHandler(memPool, app)
+		app.SetPrepareProposal(handler.PrepareProposalHandler())
+		app.SetProcessProposal(handler.ProcessProposalHandler())
+	})
+
 	bApp := baseapp.NewBaseApp(
 		iristypes.AppName,
 		logger,