diff --git a/server/homebrew.api.js b/server/homebrew.api.js
index f531bdcf9..228a08128 100644
--- a/server/homebrew.api.js
+++ b/server/homebrew.api.js
@@ -319,6 +319,11 @@ If you believe you should have access to this brew, ask the file owner to invite
 				}
 
 				// Otherwise, save the brew with updated author list
+				// markModified() is necessary to have Mongoose reduce the array length in the database
+				// Without it, starting with an array of ['A', 'B', 'C'] in the database:
+				//  - when reduced to ['A', 'B'] will result in ['A', 'B', 'C'] saved in the database
+				//  - when reduced to ['B', 'C'] will result in ['B', 'C', 'C'] saved in the database
+				brew.markModified('authors');
 				await brew.save()
 					.catch((err)=>{
 						throw { status: 500, message: err };