diff --git a/go.mod b/go.mod
index 1a9efd24..4c073566 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.18
 require (
 	github.com/oasisprotocol/curve25519-voi v0.0.0-20220328075252-7dd334e3daae
 	github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3
-	golang.org/x/crypto v0.0.0-20220321153916-2c7772ba3064
+	golang.org/x/crypto v0.17.0
 )
 
-require golang.org/x/sys v0.1.0 // indirect
+require golang.org/x/sys v0.15.0 // indirect
diff --git a/go.sum b/go.sum
index 1e0ab72b..10b48109 100644
--- a/go.sum
+++ b/go.sum
@@ -2,7 +2,7 @@ github.com/oasisprotocol/curve25519-voi v0.0.0-20220328075252-7dd334e3daae h1:7s
 github.com/oasisprotocol/curve25519-voi v0.0.0-20220328075252-7dd334e3daae/go.mod h1:hVoHR2EVESiICEMbg137etN/Lx+lSrHPTD39Z/uE+2s=
 github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3 h1:aQKxg3+2p+IFXXg97McgDGT5zcMrQoi0EICZs8Pgchs=
 github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3/go.mod h1:9/etS5gpQq9BJsJMWg1wpLbfuSnkm8dPF6FdW2JXVhA=
-golang.org/x/crypto v0.0.0-20220321153916-2c7772ba3064 h1:S25/rfnfsMVgORT4/J61MJ7rdyseOZOyvLIrZEZ7s6s=
-golang.org/x/crypto v0.0.0-20220321153916-2c7772ba3064/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/sys v0.1.0 h1:kunALQeHf1/185U1i0GOB/fy1IPRDDpuoOOqRReG57U=
-golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k=
+golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
+golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
+golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=