diff --git a/main.go b/main.go
index fdd90c7..325d4d8 100644
--- a/main.go
+++ b/main.go
@@ -108,16 +108,17 @@ func main() {
 						switch args[3] {
 						case "show", "-s":
 							cli.AddEntry(targetLocation, false, 1)
-						case "update", "-u": // TODO offline.GenUpdate(targetLocation), exit after run
+						case "update", "-u":
+							cli.GenUpdate(targetLocation, true)
 						default:
 							cli.HelpGen()
 						}
 					} else if args[3] == "update" || args[3] == "-u" {
 						switch args[4] {
 						case "show", "-s":
-							cli.AddEntry(targetLocation, false, 1)
+							cli.GenUpdate(targetLocation, false)
 						default:
-							cli.AddEntry(targetLocation, true, 1)
+							cli.GenUpdate(targetLocation, true)
 						}
 					}
 					cli.HelpGen()
diff --git a/src/cli/edit.go b/src/cli/edit.go
index f4bc5b1..7745d34 100644
--- a/src/cli/edit.go
+++ b/src/cli/edit.go
@@ -51,3 +51,25 @@ func EditEntry(targetLocation string, hidePassword bool, field int) {
 		os.Exit(1)
 	}
 }
+
+// GenUpdate generates a new password for an entry at targetLocation (user input)
+func GenUpdate(targetLocation string, hidePassword bool) {
+	// ensure targetLocation exists
+	offline.TargetIsFile(targetLocation, true, 2)
+
+	// read old entry data
+	unencryptedEntry := offline.DecryptGPG(targetLocation)
+
+	// generate a new password
+	unencryptedEntry[0] = offline.StringGen(inputInt("Password length:"), inputBinary("Generate a complex (special characters) password?"), 0.2)
+
+	// write and preview the modified entry
+	if offline.EntryIsNotEmpty(unencryptedEntry) {
+		offline.WriteEntry(targetLocation, unencryptedEntry)
+		fmt.Println(ansiBold + "\nEntry Preview:" + offline.AnsiReset)
+		EntryReader(unencryptedEntry, hidePassword)
+	} else {
+		fmt.Println(offline.AnsiError + "No data supplied for entry" + offline.AnsiReset)
+		os.Exit(1)
+	}
+}