diff --git a/squeal-postgresql.cabal b/squeal-postgresql.cabal
--- a/squeal-postgresql.cabal
+++ b/squeal-postgresql.cabal
@@ -1,5 +1,5 @@
 name: squeal-postgresql
-version: 0.6.0.1
+version: 0.6.0.2
 synopsis: Squeal PostgreSQL Library
 description: Squeal is a type-safe embedding of PostgreSQL in Haskell
 homepage: https://github.com/morphismtech/squeal
diff --git a/src/Squeal/PostgreSQL/Session/Transaction.hs b/src/Squeal/PostgreSQL/Session/Transaction.hs
--- a/src/Squeal/PostgreSQL/Session/Transaction.hs
+++ b/src/Squeal/PostgreSQL/Session/Transaction.hs
@@ -138,7 +138,7 @@
   , deferrableMode :: DeferrableMode
   } deriving (Show, Eq)
 
--- | `TransactionMode` with a `Serializable` `IsolationLevel`,
+-- | `TransactionMode` with a `ReadCommited` `IsolationLevel`,
 -- `ReadWrite` `AccessMode` and `NotDeferrable` `DeferrableMode`.
 defaultMode :: TransactionMode
 defaultMode = TransactionMode ReadCommitted ReadWrite NotDeferrable