diff --git a/Command.py b/Command.py
index 726e79c..0f72efc 100644
--- a/Command.py
+++ b/Command.py
@@ -10,7 +10,7 @@ class Command:
         self.parseCommandLine(cmdline)
 
     def __str__(self):
-        return "{'time' => %s, 'command' => %s, 'argstr' => %s}" % \
+        return "{'time' => '%s', 'command' => '%s', 'argstr' => '%s'}" % \
             (self.time, self.command, self.argstr)
 
     def parseCommandLine(self, cmdline):