go.mod    | 4 ++--
 go.sum    | 9 ++-------
 gogost.go | 2 +-
 news.texi | 4 ++++

diff --git a/go.mod b/go.mod
index 252e9689c79dd6eaf5dde7cf1b453b9c3cbefcba1ef93eca3bb3204b3a4bf6ff..5e4ab57e5ef37f96350eddfd84598a69e8966550893a52eec18435b737004120 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,5 @@
 module go.cypherpunks.ru/gogost/v5
 
-go 1.12
+go 1.17
 
-require golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e
+require golang.org/x/crypto v0.1.0
diff --git a/go.sum b/go.sum
index 89a354808e986e87d2693480db714805aba938d759533404ab4eb4dc9a5cbf0e..a1dda15b55f421488a59199e144eaec9ee95e5c1e0b0277c0da018debfbe1812 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,2 @@
-golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e h1:8foAy0aoO5GkqCvAEJ4VC4P3zksTg4X4aJCDpZzmgQI=
-golang.org/x/crypto v0.0.0-20210503195802-e9a32991a82e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/crypto v0.1.0 h1:MDRAIl0xIo9Io2xV565hzXHw3zVseKrJKodhohM5CjU=
+golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
diff --git a/gogost.go b/gogost.go
index 08fb39535ae5f03111e4e583b2eb20f67821c7a3296e4737c1a4380dc027f967..d3e5fa93258acb73c984c75018a75b19172b7c9147a841e9ace69a64b7061c3e 100644
--- a/gogost.go
+++ b/gogost.go
@@ -1,4 +1,4 @@
 // Pure Go GOST cryptographic functions library.
 package gogost
 
-const Version = "5.9.0"
+const Version = "5.9.1"
diff --git a/news.texi b/news.texi
index ab54855ba81c990aa148fe43b3e68a539b32ce36d1f00b2d414298ca947f98b8..8f3e62a171377650b0f17cbce1d73f4c46b8fff7ebcf58ad59bdc5c22bcca80c 100644
--- a/news.texi
+++ b/news.texi
@@ -3,6 +3,10 @@ @unnumbered News
 
 @table @strong
 
+@anchor{Release 5.9.1}
+@item 5.9.1
+Updated and cleaned up @file{go.sum}.
+
 @anchor{Release 5.9.0}
 @item 5.9.0
 @code{gost3410} is more thread-safe.