diff --git a/Makefile b/Makefile
index 26bc7ae..374a8ca 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-export GO_VERSION=1.21.1
+export GO_VERSION=1.21.3
 export GOLANGCI_LINT_VERSION=v1.54.0
 
 # configuration/aliases
diff --git a/go.mod b/go.mod
index 59cbd87..2c73531 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/perebaj/metrica
 
-go 1.21.0
+go 1.21.3
 
 require (
 	github.com/golangci/golangci-lint v1.54.2
diff --git a/storage.go b/storage.go
index 17c2eb8..ab91ad9 100644
--- a/storage.go
+++ b/storage.go
@@ -8,10 +8,12 @@ import (
 	"time"
 )
 
+// Counter is a struct that holds the datetime of the request
 type Counter struct {
 	Datetime string
 }
 
+// Write writes the datetime to the file
 func Write(f *os.File, c Counter) error {
 	_, err := f.WriteString(fmt.Sprintf("%v\n", c.Datetime))
 	if err != nil {
@@ -20,12 +22,16 @@ func Write(f *os.File, c Counter) error {
 	return nil
 }
 
+// Read reads the datetime from the file
 func Read(filename string) ([]time.Time, error) {
 	f, err := os.Open(filename)
 	if err != nil {
 		return nil, fmt.Errorf("error opening file: %v", err)
 	}
-	defer f.Close()
+
+	defer func() {
+		_ = f.Close()
+	}()
 
 	fileData, err := io.ReadAll(f)
 	if err != nil {
diff --git a/storage_test.go b/storage_test.go
index fdaba66..a14e500 100644
--- a/storage_test.go
+++ b/storage_test.go
@@ -15,7 +15,9 @@ func TestWriteRead(t *testing.T) {
 	if err != nil {
 		t.Fatalf("error creating temp file: %v", err)
 	}
-	defer os.Remove(f.Name())
+	defer func() {
+		_ = os.Remove(f.Name())
+	}()
 
 	if err := Write(f, c); err != nil {
 		t.Fatalf("error writing to file: %v", err)