My back door is top half glass and I need a way to make it more secure

Conni
by Conni
I have an older house and the back door is half glass and half wood. The Screen door is half glass and half screen. I wanted to put something to hold small pots of herbs and still give me more security. Right now I have a old bell from a store so I can hear someone coming in when I am home but what do I do when I am not home?

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