diff --git a/misc/stdlib_diff/README.md b/misc/stdlib_diff/README.md
index 3ed9c70bfcb..9b05deaed03 100644
--- a/misc/stdlib_diff/README.md
+++ b/misc/stdlib_diff/README.md
@@ -7,13 +7,13 @@ Stdlibs_diff is a tool that generates an html report indicating differences betw
 Compare the `go` standard libraries the `gno` standard libraries
 
 ```shell
-./stdlibs_diff --src <path to go standard libraries> --dst <path to gno standard libraries> --out <output directory>
+./stdlibs_diff -src <path to go standard libraries> -dst <path to gno standard libraries> -out <output directory>
 ```
 
 Compare the `gno` standard libraries the `go` standard libraries
 
 ```shell
-./stdlibs_diff --src <path to gno standard libraries> --dst <path to go standard libraries> --out <output directory> --src_is_gno
+./stdlibs_diff -src <path to gno standard libraries> -dst <path to go standard libraries> -out <output directory> -src_is_gno
 ```
 
 
diff --git a/misc/stdlib_diff/go.mod b/misc/stdlib_diff/go.mod
new file mode 100644
index 00000000000..b533ae398f0
--- /dev/null
+++ b/misc/stdlib_diff/go.mod
@@ -0,0 +1,3 @@
+module github.com/gnolang/gno/misc/stdlib_diff
+
+go 1.21.0
diff --git a/misc/stdlib_diff/packagediff.go b/misc/stdlib_diff/packagediff.go
index 247e49a9a27..5564e080c7c 100644
--- a/misc/stdlib_diff/packagediff.go
+++ b/misc/stdlib_diff/packagediff.go
@@ -1,8 +1,10 @@
 package main
 
 import (
-	"fmt"
+	"errors"
+	"io/fs"
 	"os"
+	"path/filepath"
 	"slices"
 	"strings"
 )
@@ -155,26 +157,28 @@ func (p *PackageDiffChecker) hasSameNumberOfFiles() bool {
 
 // listDirFiles returns a list of file names in the specified directory.
 func listDirFiles(dirPath string) ([]string, error) {
-	f, err := os.Open(dirPath)
-	if err != nil {
-		return []string{}, nil
-	}
+	fileNames := make([]string, 0)
+	err := filepath.WalkDir(dirPath, func(path string, dirEntry fs.DirEntry, err error) error {
+		if err != nil {
+			// Avoid returning an error if the file does not exists on source or destination.
+			if errors.Is(err, os.ErrNotExist) {
+				return nil
+			}
+			return err
+		}
 
-	defer func() {
-		if err := f.Close(); err != nil {
-			fmt.Fprintln(os.Stderr, "can't close "+dirPath)
+		// Only list .go and .gno files
+		if !strings.Contains(path, ".go") && !strings.Contains(path, ".gno") {
+			return nil
 		}
-	}()
 
-	filesInfo, err := f.Readdir(0)
-	if err != nil {
-		return nil, fmt.Errorf("can't list file in directory :%w", err)
-	}
+		if dirEntry != nil && !dirEntry.IsDir() {
+			filenameWithSubfolder := strings.TrimPrefix(path, dirPath+"/")
+			fileNames = append(fileNames, filenameWithSubfolder)
+		}
 
-	fileNames := make([]string, 0)
-	for _, info := range filesInfo {
-		fileNames = append(fileNames, info.Name())
-	}
+		return nil
+	})
 
-	return fileNames, nil
+	return fileNames, err
 }
diff --git a/misc/stdlib_diff/report.go b/misc/stdlib_diff/report.go
index 44ba8feb49e..72403ea434a 100644
--- a/misc/stdlib_diff/report.go
+++ b/misc/stdlib_diff/report.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"html/template"
 	"os"
+	"slices"
 )
 
 var (
@@ -133,7 +134,7 @@ func (builder *ReportBuilder) listSrcDirectories() ([]string, error) {
 
 	directories := make([]string, 0)
 	for _, dirEntry := range dirEntries {
-		if dirEntry.IsDir() {
+		if dirEntry.IsDir() && !slices.Contains([]string{"cmd", "vendor"}, dirEntry.Name()) {
 			directories = append(directories, dirEntry.Name())
 		}
 	}
diff --git a/misc/stdlib_diff/templates/package_diff_template.html b/misc/stdlib_diff/templates/package_diff_template.html
index 684e6d7bd1f..9b2158fc73b 100644
--- a/misc/stdlib_diff/templates/package_diff_template.html
+++ b/misc/stdlib_diff/templates/package_diff_template.html
@@ -12,7 +12,7 @@
     {{- else if eq .Line ""}}
     <br />
     {{- else}}
-    <p style="opacity: 0.65;">{{.Line}}</p>
+    <p style="opacity: 0.75;">{{.Line}}</p>
     {{- end}}
     {{- end}}
 </div>