diff --git a/library/dovecot b/library/dovecot
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+# This file is generated via https://github.com/dovecot/docker/blob/c9e2e8f89eebf03ecfe9878f2900b6ac9dd12332/generate-stackbrew-library.sh
+Maintainers: Aki Tuomi <cmouse@cmouse.fi> (@cmouse), Timo Sirainen <sirainen@sirainen.fi> (@sirainen)
+GitRepo: https://github.com/dovecot/docker.git
+
+Tags: 2.3.21, 2.3, latest
+Architectures: amd64
+Directory: 2.3.21
+GitCommit: 63d466c1dd6c8eff3f53f50b70f2bef7247a1338
+
+Tags: 2.3.20
+Architectures: amd64
+Directory: 2.3.20
+GitCommit: 63d466c1dd6c8eff3f53f50b70f2bef7247a1338