diff --git a/.github/workflows/client.yml b/.github/workflows/client.yml
index 7210eed..91964f2 100644
--- a/.github/workflows/client.yml
+++ b/.github/workflows/client.yml
@@ -51,7 +51,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: securego/gosec@v2.19.0
+      - uses: securego/gosec@v2.24.7
         with:
           args: ./...
 
diff --git a/pkg/chain/ethereum/block_counter.go b/pkg/chain/ethereum/block_counter.go
index 50be8ae..c80c575 100644
--- a/pkg/chain/ethereum/block_counter.go
+++ b/pkg/chain/ethereum/block_counter.go
@@ -97,7 +97,7 @@ func (bc *BlockCounter) WatchBlocks(ctx context.Context) <-chan uint64 {
 // waited on a message will be sent.
 func (bc *BlockCounter) receiveBlocks() {
 	for block := range bc.subscriptionChannel {
-		topBlockNumber, err := strconv.ParseInt(block.Number, 0, 32)
+		receivedBlockHeight, err := strconv.ParseUint(block.Number, 0, 64)
 		if err != nil {
 			logger.Errorf("error receiving a new block: [%v]", err)
 			continue
@@ -111,7 +111,6 @@ func (bc *BlockCounter) receiveBlocks() {
 		// If we have already received notification about this block,
 		// we do nothing. All handlers were already called for this block
 		// height.
-		receivedBlockHeight := uint64(topBlockNumber)
 		if receivedBlockHeight == bc.latestBlockHeight {
 			continue
 		}
diff --git a/pkg/chain/ethereum/ethutil/rate_limiter_test.go b/pkg/chain/ethereum/ethutil/rate_limiter_test.go
index c02ab98..a3bc792 100644
--- a/pkg/chain/ethereum/ethutil/rate_limiter_test.go
+++ b/pkg/chain/ethereum/ethutil/rate_limiter_test.go
@@ -480,6 +480,15 @@ func (mec *mockEthereumClient) TransactionReceipt(
 	return nil, nil
 }
 
+func (mec *mockEthereumClient) SubscribeTransactionReceipts(
+	ctx context.Context,
+	q *ethereum.TransactionReceiptsQuery,
+	ch chan<- []*types.Receipt,
+) (ethereum.Subscription, error) {
+	mec.mockRequest()
+	return nil, nil
+}
+
 func (mec *mockEthereumClient) BalanceAt(
 	ctx context.Context,
 	account common.Address,
diff --git a/pkg/chain/ethereum/ethutil/resubscribe_test.go b/pkg/chain/ethereum/ethutil/resubscribe_test.go
index 41b7f78..ea33176 100644
--- a/pkg/chain/ethereum/ethutil/resubscribe_test.go
+++ b/pkg/chain/ethereum/ethutil/resubscribe_test.go
@@ -2,6 +2,7 @@ package ethutil
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"testing"
 	"time"
@@ -18,7 +19,7 @@ func TestEmitOriginalError(t *testing.T) {
 	subscribeFn := func(ctx context.Context) (event.Subscription, error) {
 		if !failedOnce {
 			failedOnce = true
-			return nil, fmt.Errorf(expectedFailMessage)
+			return nil, errors.New(expectedFailMessage)
 		}
 		delegate := event.NewSubscription(func(unsubscribed <-chan struct{}) error {
 			return nil
diff --git a/pkg/persistence/disk_persistence.go b/pkg/persistence/disk_persistence.go
index b911355..3b364db 100644
--- a/pkg/persistence/disk_persistence.go
+++ b/pkg/persistence/disk_persistence.go
@@ -207,7 +207,7 @@ func CheckStoragePermission(dirBasePath string) error {
 func EnsureDirectoryExists(dirBasePath, newDirName string) error {
 	dirPath := filepath.Join(dirBasePath, newDirName)
 	if _, err := os.Stat(dirPath); os.IsNotExist(err) {
-		err = os.Mkdir(dirPath, os.ModePerm)
+		err = os.Mkdir(dirPath, 0o750)
 		if err != nil {
 			return fmt.Errorf(
 				"error occurred while creating a dir: [%w]; "+
diff --git a/tools/generators/promise/promise.go b/tools/generators/promise/promise.go
index 5abe610..2e0c5ae 100644
--- a/tools/generators/promise/promise.go
+++ b/tools/generators/promise/promise.go
@@ -43,7 +43,7 @@ func main() {
 	flag.Parse()
 
 	if *doHelp {
-		fmt.Printf(helpText(path.Base(os.Args[0])))
+		fmt.Print(helpText(path.Base(os.Args[0])))
 		os.Exit(0)
 	}
 
@@ -58,7 +58,7 @@ func main() {
 }
 
 func errorAndExit(err string) {
-	fmt.Fprintf(os.Stderr, err+"\n\n")
+	fmt.Fprintf(os.Stderr, "%s\n\n", err)
 	fmt.Println(helpText(path.Base(os.Args[0])))
 
 	os.Exit(1)
diff --git a/tools/generators/template/template.go b/tools/generators/template/template.go
index 345fe38..276a0f7 100644
--- a/tools/generators/template/template.go
+++ b/tools/generators/template/template.go
@@ -31,7 +31,7 @@ func main() {
 
 	templateFile := os.Args[templateFileArgIndex]
 
-	// #nosec G304 (file path provided as taint input)
+	// #nosec G304 G703 (file path provided as taint input)
 	// This line is placed in the auxiliary generator code,
 	// not in the core application. User input has to be passed to provide a
 	// path to the template file.
@@ -77,7 +77,7 @@ func main() {
 }
 
 func errorAndExit(err string) {
-	fmt.Fprintf(os.Stderr, err+"\n\n")
+	fmt.Fprintf(os.Stderr, "%s\n\n", err)
 	fmt.Println(helpText(os.Args[0]))
 
 	os.Exit(1)