diff --git a/cli/app/upgrade.go b/cli/app/upgrade.go
index 3fabd35d..0f0baf83 100644
--- a/cli/app/upgrade.go
+++ b/cli/app/upgrade.go
@@ -52,7 +52,7 @@ recipes.
 			logrus.Fatal(err)
 		}
 
-		logrus.Debugf("checking whether '%s' is already deployed", stackName)
+		logrus.Debugf("checking whether %s is already deployed", stackName)
 
 		isDeployed, deployedVersion, err := stack.IsDeployed(c.Context, cl, stackName)
 		if err != nil {
@@ -60,7 +60,7 @@ recipes.
 		}
 
 		if !isDeployed {
-			logrus.Fatalf("'%s' is not deployed?", app.Name)
+			logrus.Fatalf("%s is not deployed?", app.Name)
 		}
 
 		catl, err := catalogue.ReadRecipeCatalogue()
@@ -74,14 +74,14 @@ recipes.
 		}
 
 		if len(versions) == 0 && !internal.Chaos {
-			logrus.Fatalf("no versions available '%s' in recipe catalogue?", app.Type)
+			logrus.Fatalf("no versions available %s in recipe catalogue?", app.Type)
 		}
 
 		var availableUpgrades []string
 		if deployedVersion == "" {
 			deployedVersion = "unknown"
 			availableUpgrades = versions
-			logrus.Warnf("failed to determine version of deployed '%s'", app.Name)
+			logrus.Warnf("failed to determine version of deployed %s", app.Name)
 		}
 
 		if deployedVersion != "unknown" && !internal.Chaos {
@@ -109,10 +109,10 @@ recipes.
 		if len(availableUpgrades) > 0 && !internal.Chaos {
 			if internal.Force {
 				chosenUpgrade = availableUpgrades[len(availableUpgrades)-1]
-				logrus.Debugf("choosing '%s' as version to upgrade to", chosenUpgrade)
+				logrus.Debugf("choosing %s as version to upgrade to", chosenUpgrade)
 			} else {
 				prompt := &survey.Select{
-					Message: fmt.Sprintf("Please select an upgrade (current version: '%s'):", deployedVersion),
+					Message: fmt.Sprintf("Please select an upgrade (current version: %s):", deployedVersion),
 					Options: availableUpgrades,
 				}
 				if err := survey.AskOne(prompt, &chosenUpgrade); err != nil {