diff --git a/pkg/analyze/encode.go b/pkg/analyze/encode.go
index ee5e6351a..c9f20ff02 100644
--- a/pkg/analyze/encode.go
+++ b/pkg/analyze/encode.go
@@ -2,8 +2,8 @@ package analyze
 
 import (
 	"encoding/json"
-	"fmt"
 	"io"
+	"strconv"
 )
 
 // EncodeJSON writes JSON representation of dir
@@ -24,7 +24,7 @@ func (f *Dir) EncodeJSON(writer io.Writer, topLevel bool) error {
 
 	if !f.GetMtime().IsZero() {
 		buff = append(buff, []byte(`,"mtime":`)...)
-		buff = append(buff, []byte(fmt.Sprint(f.GetMtime().Unix()))...)
+		buff = append(buff, []byte(strconv.FormatInt(f.GetMtime().Unix(), 10))...)
 	}
 
 	buff = append(buff, '}')
@@ -65,15 +65,15 @@ func (f *File) EncodeJSON(writer io.Writer, topLevel bool) error {
 	}
 	if f.GetSize() > 0 {
 		buff = append(buff, []byte(`,"asize":`)...)
-		buff = append(buff, []byte(fmt.Sprint(f.GetSize()))...)
+		buff = append(buff, []byte(strconv.FormatInt(f.GetSize(), 10))...)
 	}
 	if f.GetUsage() > 0 {
 		buff = append(buff, []byte(`,"dsize":`)...)
-		buff = append(buff, []byte(fmt.Sprint(f.GetUsage()))...)
+		buff = append(buff, []byte(strconv.FormatInt(f.GetUsage(), 10))...)
 	}
 	if !f.GetMtime().IsZero() {
 		buff = append(buff, []byte(`,"mtime":`)...)
-		buff = append(buff, []byte(fmt.Sprint(f.GetMtime().Unix()))...)
+		buff = append(buff, []byte(strconv.FormatInt(f.GetMtime().Unix(), 10))...)
 	}
 
 	if f.Flag == '@' {
diff --git a/report/export.go b/report/export.go
index 24285795e..0d9f22649 100644
--- a/report/export.go
+++ b/report/export.go
@@ -8,6 +8,7 @@ import (
 	"os"
 	"runtime/debug"
 	"sort"
+	"strconv"
 	"sync"
 	"time"
 
@@ -97,7 +98,7 @@ func (ui *UI) AnalyzePath(path string, _ *analyze.Dir) error {
 	buff.Write([]byte(`[1,2,{"progname":"gdu","progver":"`))
 	buff.Write([]byte(build.Version))
 	buff.Write([]byte(`","timestamp":`))
-	buff.Write([]byte(fmt.Sprint(time.Now().Unix())))
+	buff.Write([]byte(strconv.FormatInt(time.Now().Unix(), 10)))
 	buff.Write([]byte("},\n"))
 
 	if err = dir.EncodeJSON(&buff, true); err != nil {
diff --git a/tui/show.go b/tui/show.go
index 115f6525f..ca9c4d266 100644
--- a/tui/show.go
+++ b/tui/show.go
@@ -1,7 +1,7 @@
 package tui
 
 import (
-	"fmt"
+	"strconv"
 	"strings"
 
 	"github.com/dundee/gdu/v5/build"
@@ -70,7 +70,7 @@ func (ui *UI) showDir() {
 			" Apparent size: " +
 			footerNumberColor +
 			ui.formatSize(totalSize, true, false) +
-			" Items: " + footerNumberColor + fmt.Sprint(itemCount) +
+			" Items: " + footerNumberColor + strconv.Itoa(itemCount) +
 			footerTextColor +
 			" Sorting by: " + ui.sortBy + " " + ui.sortOrder)