diff --git a/Sources/Commands/Run.swift b/Sources/Commands/Run.swift
index 42f309b..fbf9dc3 100644
--- a/Sources/Commands/Run.swift
+++ b/Sources/Commands/Run.swift
@@ -6,11 +6,11 @@ extension RunOn {
         static var configuration =
             CommandConfiguration(abstract: "Start event observer.")
 
-        @Flag(
+        @Option(
             name: .shortAndLong,
-            help: "Print more information for debugging."
+            help: "Logging level."
         )
-        var verbose = false
+        var log = LogLevel.error
         @Option(
             name: [.customLong("config"), .customShort("c")],
             help: "Configuration file path."
@@ -22,7 +22,7 @@ extension RunOn {
         }
 
         mutating func run() throws {
-			logger.setLevel(verbose ? .debug : .error)
+			logger.setLevel(log)
             let config = try Config(fromContentsOf: configUrl)
 			let handler = ConfigHandler(with: config)
             let activeSources = sources.filter { source in
diff --git a/Sources/Logger/LogLevel.swift b/Sources/Logger/LogLevel.swift
index 69121a3..bad55ef 100644
--- a/Sources/Logger/LogLevel.swift
+++ b/Sources/Logger/LogLevel.swift
@@ -1,3 +1,5 @@
+import ArgumentParser
+
 /// Logger log level
 enum LogLevel {
 	case debug
@@ -7,7 +9,7 @@ enum LogLevel {
 	case warning
 }
 
-extension LogLevel: Comparable, Equatable {
+extension LogLevel: Comparable, Equatable, ExpressibleByArgument {
 	/// Return log level as integer
 	var integerValue: Int {
 		switch self {
@@ -28,6 +30,28 @@ extension LogLevel: Comparable, Equatable {
 		}
 	}
 
+	init?(argument: String) {
+		switch argument.lowercased() {
+		case "debug":
+			self = .debug
+
+		case "disabled":
+			self = .disabled
+
+		case "error":
+			self = .error
+
+		case "info":
+			self = .info
+
+		case "warning":
+			self = .warning
+
+		default:
+			return nil
+		}
+	}
+
 	static func < (lhs: LogLevel, rhs: LogLevel) -> Bool {
         lhs.integerValue < rhs.integerValue
     }