diff --git a/src/Control.Monad.Postgres.purs b/src/Control.Monad.Postgres.purs
index 961ed3d..bc9bb99 100644
--- a/src/Control.Monad.Postgres.purs
+++ b/src/Control.Monad.Postgres.purs
@@ -189,11 +189,11 @@ runHasPostgres conn t = (unwrap $ unwrap t) conn
 query :: forall m @a. MonadPostgres m => Pg.FromSQLRow a => Query.BuilderT m String -> m (Array a)
 query = query' identity
 
-exec :: forall m @a. MonadPostgres m => Pg.FromSQLRow a => Query.BuilderT m String -> m Unit
+exec :: forall m. MonadPostgres m => Query.BuilderT m String -> m Unit
 exec = exec' identity
 
 query0 :: forall m @a. MonadPostgres m => Pg.FromSQLRow a => String -> m (Array a)
 query0 q = query' identity (pure q)
 
-exec0 :: forall m @a. MonadPostgres m => Pg.FromSQLRow a => String -> m Unit
+exec0 :: forall m. MonadPostgres m => String -> m Unit
 exec0 q = exec' identity (pure q)