"They are having a panic room installed," a source said.
The couple tied the knot in September 2014 and then spent their honeymoon in the 17th-century British manor house, reported Us magazine.
"It'll be fireproof, bombproof, and attack-resistant. Amal has high-profile clients in controversial cases. She needs to be secure," the source added.
The manor is apparently set back from the road in a remote countryside and is said to be luxurious, well-decorated, and super-private.