diff --git a/simapp/state.go b/simapp/state.go
index 22a4e53a63f0..8815784b0a60 100644
--- a/simapp/state.go
+++ b/simapp/state.go
@@ -81,7 +81,7 @@ func AppStateRandomizedFn(
 	var initialStake, numInitiallyBonded int64
 	appParams.GetOrGenerate(
 		cdc, StakePerAccount, &initialStake, r,
-		func(r *rand.Rand) { initialStake = int64(r.Intn(1e12)) },
+		func(r *rand.Rand) { initialStake = r.Int63n(1e12) },
 	)
 	appParams.GetOrGenerate(
 		cdc, InitiallyBondedValidators, &numInitiallyBonded, r,