diff --git a/src/Database/PostgreSQL/Replicant.hs b/src/Database/PostgreSQL/Replicant.hs
index 339e76b..1dd17ad 100644
--- a/src/Database/PostgreSQL/Replicant.hs
+++ b/src/Database/PostgreSQL/Replicant.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 {-|
 Module      : Database.PostgreSQL.Replicant
 Description : A PostgreSQL streaming replication library
diff --git a/src/Database/PostgreSQL/Replicant/Connection.hs b/src/Database/PostgreSQL/Replicant/Connection.hs
index 9a62659..f5d6b87 100644
--- a/src/Database/PostgreSQL/Replicant/Connection.hs
+++ b/src/Database/PostgreSQL/Replicant/Connection.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 {-
 Module : Database.PostgreSQL.Replicant.Connection
 Description : Create replication handling connections to PostgreSQL
diff --git a/src/Database/PostgreSQL/Replicant/Exception.hs b/src/Database/PostgreSQL/Replicant/Exception.hs
index 50599e4..d757838 100644
--- a/src/Database/PostgreSQL/Replicant/Exception.hs
+++ b/src/Database/PostgreSQL/Replicant/Exception.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 module Database.PostgreSQL.Replicant.Exception where
 
 import Control.Exception
diff --git a/src/Database/PostgreSQL/Replicant/Message.hs b/src/Database/PostgreSQL/Replicant/Message.hs
index 1cde8da..9d7039d 100644
--- a/src/Database/PostgreSQL/Replicant/Message.hs
+++ b/src/Database/PostgreSQL/Replicant/Message.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 {-|
 Module      : Database.PostgreSQL.Replicant.Message
 Description : Streaming replication message types
diff --git a/src/Database/PostgreSQL/Replicant/PostgresUtils.hs b/src/Database/PostgreSQL/Replicant/PostgresUtils.hs
index 284d49b..3255ea1 100644
--- a/src/Database/PostgreSQL/Replicant/PostgresUtils.hs
+++ b/src/Database/PostgreSQL/Replicant/PostgresUtils.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 module Database.PostgreSQL.Replicant.PostgresUtils where
 
 import Data.Fixed
diff --git a/src/Database/PostgreSQL/Replicant/Protocol.hs b/src/Database/PostgreSQL/Replicant/Protocol.hs
index cfde018..83456a0 100644
--- a/src/Database/PostgreSQL/Replicant/Protocol.hs
+++ b/src/Database/PostgreSQL/Replicant/Protocol.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 {-|
 Module      : Database.PostgreSQL.Replicant.Protocol
 Description : Streaming replication protocol
diff --git a/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs b/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs
index f50d861..b1f61a0 100644
--- a/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs
+++ b/src/Database/PostgreSQL/Replicant/ReplicationSlot.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 {-|
 Module      : Database.PostgreSQL.Replicant.ReplicationSlot
 Description : Replication slot query commands
diff --git a/src/Database/PostgreSQL/Replicant/Serialize.hs b/src/Database/PostgreSQL/Replicant/Serialize.hs
index b43e9d8..2f75b90 100644
--- a/src/Database/PostgreSQL/Replicant/Serialize.hs
+++ b/src/Database/PostgreSQL/Replicant/Serialize.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 module Database.PostgreSQL.Replicant.Serialize where
 
 import Data.ByteString (ByteString)
diff --git a/src/Database/PostgreSQL/Replicant/Settings.hs b/src/Database/PostgreSQL/Replicant/Settings.hs
index c537a8e..4a9bc57 100644
--- a/src/Database/PostgreSQL/Replicant/Settings.hs
+++ b/src/Database/PostgreSQL/Replicant/Settings.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 module Database.PostgreSQL.Replicant.Settings where
 
 import Data.ByteString (ByteString)
diff --git a/src/Database/PostgreSQL/Replicant/State.hs b/src/Database/PostgreSQL/Replicant/State.hs
index 0af9728..91cd600 100644
--- a/src/Database/PostgreSQL/Replicant/State.hs
+++ b/src/Database/PostgreSQL/Replicant/State.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 {-|
 Module      : Database.PostgreSQL.Replicant.State
 Description : Internal replication stream state
diff --git a/src/Database/PostgreSQL/Replicant/Types/Lsn.hs b/src/Database/PostgreSQL/Replicant/Types/Lsn.hs
index a3dce21..3d68dc8 100644
--- a/src/Database/PostgreSQL/Replicant/Types/Lsn.hs
+++ b/src/Database/PostgreSQL/Replicant/Types/Lsn.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE Strict #-}
+
 {-|
 Module      : Database.PostgreSQL.Replicant.Types.Lsn
 Description : Types and parsers for LSNs