diff --git a/contracts/core/BEMultiSigWallet.sol b/contracts/core/BEMultiSigWallet.sol
index e75d661..4a61519 100644
--- a/contracts/core/BEMultiSigWallet.sol
+++ b/contracts/core/BEMultiSigWallet.sol
@@ -199,6 +199,10 @@ contract BEMultiSigWallet is AccessControlEnumerable {
     bytes32 salt,
     uint256 delay
   ) external virtual onlyRoleOrOpenRole(PROPOSER_ROLE) {
+    require(
+      targets.length > 0,
+      "BEMultiSigWallet: no transactions to schedule"
+    );
     require(
       targets.length == values.length,
       "BEMultiSigWallet: length mismatch"
@@ -247,6 +251,7 @@ contract BEMultiSigWallet is AccessControlEnumerable {
   function confirmTransaction(
     bytes32[] calldata ids
   ) external onlyRoleOrOpenRole(CONFIRM_ROLE) {
+    require(ids.length > 0, "BEMultiSigWallet: empty ids");
     for (uint256 i = 0; i < ids.length; ++i) {
       require(
         isOperationPending(ids[i]),
@@ -263,6 +268,7 @@ contract BEMultiSigWallet is AccessControlEnumerable {
   function revokeConfirmation(
     bytes32[] calldata ids
   ) external onlyRoleOrOpenRole(CONFIRM_ROLE) {
+    require(ids.length > 0, "BEMultiSigWallet: empty ids");
     for (uint256 i = 0; i < ids.length; ++i) {
       require(
         isOperationPending(ids[i]),
@@ -289,6 +295,7 @@ contract BEMultiSigWallet is AccessControlEnumerable {
     bytes32 predecessor,
     bytes32 salt
   ) external payable virtual onlyRoleOrOpenRole(EXECUTOR_ROLE) {
+    require(targets.length > 0, "BEMultiSigWallet: no calls to make");
     require(
       targets.length == values.length,
       "BEMultiSigWallet: length mismatch"