diff --git a/Changelog.md b/Changelog.md
index 8c927c8..7482ef3 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -5,6 +5,7 @@ All notable changes to this project will be documented in this file. The format
 ## Changed
 - Parallelized update process
 - Simplified messages during the update process
+- Improved error messages
 # [0.9.1] - 2022-03-19
 ## Changed 
 - Changed the message at the time of update was incorrect, so the message was corrected.
diff --git a/cmd/update.go b/cmd/update.go
index 9cbb055..9fb22bb 100644
--- a/cmd/update.go
+++ b/cmd/update.go
@@ -83,10 +83,10 @@ func update(pkgs []goutil.Package, dryRun bool) int {
 	updater := func(p goutil.Package, result chan updateResult) {
 		var err error
 		if p.ImportPath == "" {
-			err = fmt.Errorf(" %s", p.Name)
+			err = fmt.Errorf(" %s is not installed by 'go install' (or permission incorrect)", p.Name)
 		} else {
 			if err = goutil.Install(p.ImportPath); err != nil {
-				err = fmt.Errorf(" %w: %s", err, p.Name)
+				err = fmt.Errorf(" %s %w", p.Name, err)
 			}
 		}
 
diff --git a/internal/goutil/goutil.go b/internal/goutil/goutil.go
index 86c2ade..06bff1b 100644
--- a/internal/goutil/goutil.go
+++ b/internal/goutil/goutil.go
@@ -151,10 +151,10 @@ func CanUseGoCmd() error {
 // Install execute "$ go install <importPath>@latest"
 func Install(importPath string) error {
 	if importPath == "command-line-arguments" {
-		return errors.New("this is devel-binary copied from local environment")
+		return errors.New("is devel-binary copied from local environment")
 	}
 	if err := exec.Command("go", "install", importPath+"@latest").Run(); err != nil {
-		return errors.New("can't install " + importPath)
+		return fmt.Errorf("can't install %s: %w", importPath, err)
 	}
 	return nil
 }