diff --git a/go.mod b/go.mod
index 7eed1e0a..161bfeb8 100644
--- a/go.mod
+++ b/go.mod
@@ -6,8 +6,8 @@ require (
 	github.com/cockroachdb/apd v1.1.0
 	github.com/jackc/pgconn v0.0.0-20190827231150-66aaed7c9eb0
 	github.com/jackc/pgio v1.0.0
-	github.com/jackc/pgproto3/v2 v2.0.0-alpha1.0.20190609003834-432c2951c711
-	github.com/jackc/pgtype v0.0.0-20190825053211-b1e25e4ea49c
+	github.com/jackc/pgproto3/v2 v2.0.0-rc1
+	github.com/jackc/pgtype v0.0.0-20190828014616-a8802b16cc59
 	github.com/jackc/puddle v0.0.0-20190608224051-11cab39313c9
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.2 // indirect
diff --git a/go.sum b/go.sum
index 1df29f1a..60f5f71a 100644
--- a/go.sum
+++ b/go.sum
@@ -29,12 +29,14 @@ github.com/jackc/pgproto3/v2 v2.0.0-alpha1.0.20190420180111-c116219b62db h1:UpaK
 github.com/jackc/pgproto3/v2 v2.0.0-alpha1.0.20190420180111-c116219b62db/go.mod h1:bhq50y+xrl9n5mRYyCBFKkpRVTLYJVWeCc+mEAI3yXA=
 github.com/jackc/pgproto3/v2 v2.0.0-alpha1.0.20190609003834-432c2951c711 h1:vZp4bYotXUkFx7JUSm7U8KV/7Q0AOdrQxxBBj0ZmZsg=
 github.com/jackc/pgproto3/v2 v2.0.0-alpha1.0.20190609003834-432c2951c711/go.mod h1:uH0AWtUmuShn0bcesswc4aBTWGvw0cAxIJp+6OB//Wg=
+github.com/jackc/pgproto3/v2 v2.0.0-rc1 h1:Qoq8E9/be2M6BiRi/+MePnH6ST1RpYMFgSAx5ba8QFw=
+github.com/jackc/pgproto3/v2 v2.0.0-rc1/go.mod h1:uH0AWtUmuShn0bcesswc4aBTWGvw0cAxIJp+6OB//Wg=
 github.com/jackc/pgtype v0.0.0-20190421001408-4ed0de4755e0 h1:mX93v750WifMD1htCt7vqeolcnpaG1gz8URVGjSzcUM=
 github.com/jackc/pgtype v0.0.0-20190421001408-4ed0de4755e0/go.mod h1:hdSHsc1V01CGwFsrv11mJRHWJ6aifDLfdV3aVjFF0zg=
 github.com/jackc/pgtype v0.0.0-20190824184912-ab885b375b90 h1:aN5Vlwa2Q3QvxHDtZNi1x+GYkQyketBadMjtiug7AbM=
 github.com/jackc/pgtype v0.0.0-20190824184912-ab885b375b90/go.mod h1:KcahbBH1nCMSo2DXpzsoWOAfFkdEtEJpPbVLq8eE+mc=
-github.com/jackc/pgtype v0.0.0-20190825053211-b1e25e4ea49c h1:FVGlUaxJxGV/gEs/xsQ6w33L0ofHttAfRxj/yPQC8yI=
-github.com/jackc/pgtype v0.0.0-20190825053211-b1e25e4ea49c/go.mod h1:MWlu30kVJrUS8lot6TQqcg7mtthZ9T0EoIBFiJcmcyw=
+github.com/jackc/pgtype v0.0.0-20190828014616-a8802b16cc59 h1:xOamcCJ9MFJTxR5bvw3ZXmiP8evQMohdt2VJ57C0W8Q=
+github.com/jackc/pgtype v0.0.0-20190828014616-a8802b16cc59/go.mod h1:MWlu30kVJrUS8lot6TQqcg7mtthZ9T0EoIBFiJcmcyw=
 github.com/jackc/pgx/v4 v4.0.0-20190420224344-cc3461e65d96/go.mod h1:mdxmSJJuR08CZQyj1PVQBHy9XOp5p8/SHH6a0psbY9Y=
 github.com/jackc/pgx/v4 v4.0.0-20190421002000-1b8f0016e912/go.mod h1:no/Y67Jkk/9WuGR0JG/JseM9irFbnEPbuWV2EELPNuM=
 github.com/jackc/pgx/v4 v4.0.0-pre1.0.20190824185557-6972a5742186/go.mod h1:X+GQnOEnf1dqHGpw7JmHqHc1NxDoalibchSk9/RWuDc=