diff --git a/src/Database/PostgreSQL/Replicant.hs b/src/Database/PostgreSQL/Replicant.hs
index 341a70e..0c96c36 100644
--- a/src/Database/PostgreSQL/Replicant.hs
+++ b/src/Database/PostgreSQL/Replicant.hs
@@ -3,7 +3,7 @@
 {-|
 Module      : Database.PostgreSQL.Replicant
 Description : A PostgreSQL streaming replication library
-Copyright   : (c) James King, 2021
+Copyright   : (c) James King, 2020, 2021
 License     : BSD3
 Maintainer  : james@agentultra.com
 Stability   : experimental
diff --git a/src/Database/PostgreSQL/Replicant/Message.hs b/src/Database/PostgreSQL/Replicant/Message.hs
index 0c0089c..3c084f7 100644
--- a/src/Database/PostgreSQL/Replicant/Message.hs
+++ b/src/Database/PostgreSQL/Replicant/Message.hs
@@ -1,7 +1,7 @@
 {-|
 Module      : Database.PostgreSQL.Replicant.Message
 Description : Streaming replication message types
-Copyright   : (c) James King, 2021
+Copyright   : (c) James King, 2020, 2021
 License     : BSD3
 Maintainer  : james@agentultra.com
 Stability   : experimental
diff --git a/src/Database/PostgreSQL/Replicant/Protocol.hs b/src/Database/PostgreSQL/Replicant/Protocol.hs
index a7eeed1..0519b1b 100644
--- a/src/Database/PostgreSQL/Replicant/Protocol.hs
+++ b/src/Database/PostgreSQL/Replicant/Protocol.hs
@@ -1,7 +1,7 @@
 {-|
 Module      : Database.PostgreSQL.Replicant.Protocol
 Description : Streaming replication protocol
-Copyright   : (c) James King, 2021
+Copyright   : (c) James King, 2020, 2021
 License     : BSD3
 Maintainer  : james@agentultra.com
 Stability   : experimental
diff --git a/src/Database/PostgreSQL/Replicant/Queue.hs b/src/Database/PostgreSQL/Replicant/Queue.hs
index 1608273..a1080cf 100644
--- a/src/Database/PostgreSQL/Replicant/Queue.hs
+++ b/src/Database/PostgreSQL/Replicant/Queue.hs
@@ -1,3 +1,14 @@
+{-|
+Module      : Database.PostgreSQL.Replicant.Queue
+Description : Bounded and unbounded FIFO queues
+Copyright   : (c) James King, 2020, 2021
+License     : BSD3
+Maintainer  : james@agentultra.com
+Stability   : experimental
+Portability : POSIX
+
+Shared FIFO queues
+-}
 module Database.PostgreSQL.Replicant.Queue where
 
 import Control.Concurrent.MVar
diff --git a/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs b/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs
index 3b38dfe..a00fa0b 100644
--- a/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs
+++ b/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs
@@ -1,3 +1,15 @@
+{-|
+Module      : Database.PostgreSQL.Replicant.ReplicationSlot
+Description : Replication slot query commands
+Copyright   : (c) James King, 2020, 2021
+License     : BSD3
+Maintainer  : james@agentultra.com
+Stability   : experimental
+Portability : POSIX
+
+This module contains the PostgreSQL queries, types, and functions for
+working with querying, creating, and working with replication slots.
+-}
 module Database.PostgreSQL.Replicant.ReplicationSlot where
 
 import Control.Exception
diff --git a/src/Database/PostgreSQL/Replicant/State.hs b/src/Database/PostgreSQL/Replicant/State.hs
index 96c20ea..d60d477 100644
--- a/src/Database/PostgreSQL/Replicant/State.hs
+++ b/src/Database/PostgreSQL/Replicant/State.hs
@@ -1,7 +1,7 @@
 {-|
 Module      : Database.PostgreSQL.Replicant.State
 Description : Internal replication stream state
-Copyright   : (c) James King, 2021
+Copyright   : (c) James King, 2020, 2021
 License     : BSD3
 Maintainer  : james@agentultra.com
 Stability   : experimental
diff --git a/src/Database/PostgreSQL/Replicant/Types/Lsn.hs b/src/Database/PostgreSQL/Replicant/Types/Lsn.hs
index 4d3edce..4753375 100644
--- a/src/Database/PostgreSQL/Replicant/Types/Lsn.hs
+++ b/src/Database/PostgreSQL/Replicant/Types/Lsn.hs
@@ -1,7 +1,7 @@
 {-|
 Module      : Database.PostgreSQL.Replicant.Types.Lsn
 Description : Types and parsers for LSNs
-Copyright   : (c) James King, 2021
+Copyright   : (c) James King, 2020, 2021
 License     : BSD3
 Maintainer  : james@agentultra.com
 Stability   : experimental