diff --git a/app/fee.go b/app/fee.go
index 8c5c47d..385b7cf 100644
--- a/app/fee.go
+++ b/app/fee.go
@@ -68,9 +68,8 @@ func (dfd DeductFeeDecorator) AnteHandle(ctx sdk.Context, tx sdk.Tx, simulate bo
 	msgs := tx.GetMsgs()
 	if len(msgs) == 1 {
 		msg := msgs[0]
-		switch msg.(type) {
+		switch msg := msg.(type) {
 		case *airdroptypes.MsgClaimAllocation:
-			msg := msg.(*airdroptypes.MsgClaimAllocation)
 			signer := msg.GetSigners()[0]
 			cacheCtx, _ := ctx.CacheContext()
 			if acc := dfd.ak.GetAccount(ctx, signer); acc == nil {
diff --git a/cmd/teritorid/cmd/richest_snapshot.go b/cmd/teritorid/cmd/richest_snapshot.go
index 0b240b4..ed5930c 100644
--- a/cmd/teritorid/cmd/richest_snapshot.go
+++ b/cmd/teritorid/cmd/richest_snapshot.go
@@ -141,7 +141,7 @@ Example:
 
 			for _, delegation := range stakingGen.Delegations {
 				address := delegation.DelegatorAddress
-				if excludeAddrs[address] == true {
+				if excludeAddrs[address] {
 					continue
 				}
 
diff --git a/x/airdrop/client/cli/fetch_and_remove_airdrop.go b/x/airdrop/client/cli/fetch_and_remove_airdrop.go
index 7b817c1..5bcacfb 100644
--- a/x/airdrop/client/cli/fetch_and_remove_airdrop.go
+++ b/x/airdrop/client/cli/fetch_and_remove_airdrop.go
@@ -44,6 +44,9 @@ func saveAllocation(path string, allocations []airdroptypes.AirdropAllocation) {
 	}
 
 	f, err := os.Create(path)
+	if err != nil {
+		panic(err)
+	}
 	defer f.Close()
 
 	if err != nil {
diff --git a/x/airdrop/client/cli/tx.go b/x/airdrop/client/cli/tx.go
index cc7b57f..32a2b78 100644
--- a/x/airdrop/client/cli/tx.go
+++ b/x/airdrop/client/cli/tx.go
@@ -41,6 +41,9 @@ func GetTxClaimAllocationCmd() *cobra.Command {
 		Args:  cobra.ExactArgs(2),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			clientCtx, err := client.GetClientTxContext(cmd)
+			if err != nil {
+				return err
+			}
 
 			msg := types.NewMsgClaimAllocation(
 				args[0],
@@ -71,6 +74,9 @@ func GetTxSetAllocationCmd() *cobra.Command {
 		Args:  cobra.ExactArgs(4),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			clientCtx, err := client.GetClientTxContext(cmd)
+			if err != nil {
+				return err
+			}
 
 			amount, err := sdk.ParseCoinNormalized(args[2])
 			if err != nil {
diff --git a/x/mint/client/cli/tx.go b/x/mint/client/cli/tx.go
index 720fd61..a602539 100644
--- a/x/mint/client/cli/tx.go
+++ b/x/mint/client/cli/tx.go
@@ -36,6 +36,9 @@ func GetTxBurnTokensCmd() *cobra.Command {
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			clientCtx, err := client.GetClientTxContext(cmd)
+			if err != nil {
+				return err
+			}
 
 			amount, err := sdk.ParseCoinsNormalized(args[0])
 			if err != nil {
diff --git a/x/mint/keeper/keeper.go b/x/mint/keeper/keeper.go
index da4610a..1e8bdcf 100644
--- a/x/mint/keeper/keeper.go
+++ b/x/mint/keeper/keeper.go
@@ -3,7 +3,6 @@ package keeper
 import (
 	"fmt"
 
-	"cosmossdk.io/math"
 	"github.com/cometbft/cometbft/libs/log"
 
 	"github.com/TERITORI/teritori-chain/x/mint/types"
@@ -35,15 +34,6 @@ func (e invalidRatioError) Error() string {
 	return fmt.Sprintf("mint allocation ratio (%s) is greater than 1", e.ActualRatio)
 }
 
-type insufficientDevVestingBalanceError struct {
-	ActualBalance         math.Int
-	AttemptedDistribution math.Int
-}
-
-func (e insufficientDevVestingBalanceError) Error() string {
-	return fmt.Sprintf("developer vesting balance (%s) is smaller than requested distribution of (%s)", e.ActualBalance, e.AttemptedDistribution)
-}
-
 const emptyAddressReceiver = ""
 
 // NewKeeper creates a new mint Keeper instance.
diff --git a/x/mint/types/params.go b/x/mint/types/params.go
index 911289a..7d011b1 100644
--- a/x/mint/types/params.go
+++ b/x/mint/types/params.go
@@ -87,7 +87,10 @@ func addressTable() map[string]string {
 	}`
 
 	var addressMap map[string]string
-	json.Unmarshal([]byte(addressJSON), &addressMap)
+	err := json.Unmarshal([]byte(addressJSON), &addressMap)
+	if err != nil {
+		panic(err)
+	}
 	return addressMap
 }