diff --git a/changelog/16224.txt b/changelog/16224.txt
new file mode 100644
index 000000000..822b24504
--- /dev/null
+++ b/changelog/16224.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+core: fix GPG encryption to support subkeys.
+```
diff --git a/command/pgp_test.go b/command/pgp_test.go
index 8d0b5d6a0..b9f3ee2a9 100644
--- a/command/pgp_test.go
+++ b/command/pgp_test.go
@@ -13,8 +13,8 @@ import (
 	"github.com/hashicorp/vault/helper/pgpkeys"
 	"github.com/hashicorp/vault/vault"
 
-	"github.com/keybase/go-crypto/openpgp"
-	"github.com/keybase/go-crypto/openpgp/packet"
+	"github.com/ProtonMail/go-crypto/openpgp"
+	"github.com/ProtonMail/go-crypto/openpgp/packet"
 )
 
 func getPubKeyFiles(t *testing.T) (string, []string, error) {
diff --git a/go.mod b/go.mod
index c98e6ff8b..5ece8c471 100644
--- a/go.mod
+++ b/go.mod
@@ -22,6 +22,7 @@ require (
 	github.com/Azure/go-autorest/autorest v0.11.24
 	github.com/Azure/go-autorest/autorest/adal v0.9.18
 	github.com/NYTimes/gziphandler v1.1.1
+	github.com/ProtonMail/go-crypto v0.0.0-20220824120805-4b6e5c587895
 	github.com/SAP/go-hdb v0.14.1
 	github.com/Sectorbob/mlab-ns2 v0.0.0-20171030222938-d3aa0c295a8a
 	github.com/aerospike/aerospike-client-go/v5 v5.6.0
@@ -140,7 +141,6 @@ require (
 	github.com/jefferai/isbadcipher v0.0.0-20190226160619-51d2077c035f
 	github.com/jefferai/jsonx v1.0.0
 	github.com/joyent/triton-go v1.7.1-0.20200416154420-6801d15b779f
-	github.com/keybase/go-crypto v0.0.0-20190403132359-d65b6b94177f
 	github.com/kr/pretty v0.3.0
 	github.com/kr/text v0.2.0
 	github.com/mattn/go-colorable v0.1.12
@@ -254,6 +254,7 @@ require (
 	github.com/cespare/xxhash/v2 v2.1.1 // indirect
 	github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible // indirect
 	github.com/circonus-labs/circonusllhist v0.1.3 // indirect
+	github.com/cloudflare/circl v1.1.0 // indirect
 	github.com/cloudfoundry-community/go-cfclient v0.0.0-20210823134051-721f0e559306 // indirect
 	github.com/containerd/cgroups v1.0.3 // indirect
 	github.com/containerd/containerd v1.5.13 // indirect
diff --git a/go.sum b/go.sum
index 857918777..325397906 100644
--- a/go.sum
+++ b/go.sum
@@ -183,6 +183,8 @@ github.com/NYTimes/gziphandler v1.1.1/go.mod h1:n/CVRwUEOgIxrgPvAQhUUr9oeUtvrhMo
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 h1:TngWCqHvy9oXAN6lEVMRuU21PR1EtLVZJmdB18Gu3Rw=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
+github.com/ProtonMail/go-crypto v0.0.0-20220824120805-4b6e5c587895 h1:NsReiLpErIPzRrnogAXYwSoU7txA977LjDGrbkewJbg=
+github.com/ProtonMail/go-crypto v0.0.0-20220824120805-4b6e5c587895/go.mod h1:UBYPn8k0D56RtnR8RFQMjmh4KrZzWJ5o7Z9SYjossQ8=
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.1 h1:WEQqlqaGbrPkxLJWfBwQmfEAE1Z7ONdDLqrN38tNFfI=
@@ -300,6 +302,7 @@ github.com/buger/jsonparser v0.0.0-20180808090653-f4dd9f5a6b44/go.mod h1:bbYlZJ7
 github.com/bugsnag/bugsnag-go v0.0.0-20141110184014-b1d153021fcd/go.mod h1:2oa8nejYd4cQ/b0hMIopN0lCRxU0bueqREvZLWFrtK8=
 github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b/go.mod h1:obH5gd0BsqsP2LwDJ9aOkm/6J86V6lyAXCoQWGw3K50=
 github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0/go.mod h1:D/8v3kj0zr8ZAKg1AQ6crr+5VwKN5eIywRkfhyM/+dE=
+github.com/bwesterb/go-ristretto v1.2.0/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
 github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=
 github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/cenkalti/backoff/v3 v3.0.0/go.mod h1:cIeZDE3IrqwwJl6VUwCN6trj1oXrTS4rc0ij+ULvLYs=
@@ -334,6 +337,8 @@ github.com/circonus-labs/circonusllhist v0.1.3 h1:TJH+oke8D16535+jHExHj4nQvzlZrj
 github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
 github.com/client9/misspell v0.3.4 h1:ta993UF76GwbvJcIo3Y68y/M3WxlpEHPWIGDkJYwzJI=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cloudflare/circl v1.1.0 h1:bZgT/A+cikZnKIwn7xL2OBj012Bmvho/o6RpRvv3GKY=
+github.com/cloudflare/circl v1.1.0/go.mod h1:prBCrKB9DV4poKZY1l9zBXg2QJY7mvgRvtMxxK7fi4I=
 github.com/cloudfoundry-community/go-cfclient v0.0.0-20210823134051-721f0e559306 h1:k8q2Nsz7kNaUlysVCnWIFLMUSqiKXaGLdIf9P0GsX2Y=
 github.com/cloudfoundry-community/go-cfclient v0.0.0-20210823134051-721f0e559306/go.mod h1:0FdHblxw7g3M2PPICOw9i8YZOHP9dZTHbJUtoxL7Z/E=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
@@ -1281,8 +1286,6 @@ github.com/karrick/godirwalk v1.8.0/go.mod h1:H5KPZjojv4lE+QYImBI8xVtrBRgYrIVsaR
 github.com/karrick/godirwalk v1.10.3/go.mod h1:RoGL9dQei4vP9ilrpETWE8CLOZ1kiN0LhBygSwrAsHA=
 github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
 github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
-github.com/keybase/go-crypto v0.0.0-20190403132359-d65b6b94177f h1:Gsc9mVHLRqBjMgdQCghN9NObCcRncDqxJvBvEaIIQEo=
-github.com/keybase/go-crypto v0.0.0-20190403132359-d65b6b94177f/go.mod h1:ghbZscTyKdM07+Fw3KSi0hcJm+AlEUWj8QLlPtijN/M=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
diff --git a/helper/pgpkeys/encrypt_decrypt.go b/helper/pgpkeys/encrypt_decrypt.go
index 31678df69..554013d6a 100644
--- a/helper/pgpkeys/encrypt_decrypt.go
+++ b/helper/pgpkeys/encrypt_decrypt.go
@@ -5,8 +5,8 @@ import (
 	"encoding/base64"
 	"fmt"
 
-	"github.com/keybase/go-crypto/openpgp"
-	"github.com/keybase/go-crypto/openpgp/packet"
+	"github.com/ProtonMail/go-crypto/openpgp"
+	"github.com/ProtonMail/go-crypto/openpgp/packet"
 )
 
 // EncryptShares takes an ordered set of byte slices to encrypt and the
diff --git a/helper/pgpkeys/flag.go b/helper/pgpkeys/flag.go
index 4490d891d..e107bc994 100644
--- a/helper/pgpkeys/flag.go
+++ b/helper/pgpkeys/flag.go
@@ -8,7 +8,7 @@ import (
 	"os"
 	"strings"
 
-	"github.com/keybase/go-crypto/openpgp"
+	"github.com/ProtonMail/go-crypto/openpgp"
 )
 
 // PubKeyFileFlag implements flag.Value and command.Example to receive exactly
diff --git a/helper/pgpkeys/flag_test.go b/helper/pgpkeys/flag_test.go
index 86e04611f..ec6402d5e 100644
--- a/helper/pgpkeys/flag_test.go
+++ b/helper/pgpkeys/flag_test.go
@@ -12,8 +12,8 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/keybase/go-crypto/openpgp"
-	"github.com/keybase/go-crypto/openpgp/packet"
+	"github.com/ProtonMail/go-crypto/openpgp"
+	"github.com/ProtonMail/go-crypto/openpgp/packet"
 )
 
 func TestPubKeyFilesFlag_implements(t *testing.T) {
diff --git a/helper/pgpkeys/keybase.go b/helper/pgpkeys/keybase.go
index a9dde2bdd..b2571b451 100644
--- a/helper/pgpkeys/keybase.go
+++ b/helper/pgpkeys/keybase.go
@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/ProtonMail/go-crypto/openpgp"
 	cleanhttp "github.com/hashicorp/go-cleanhttp"
 	"github.com/hashicorp/vault/sdk/helper/jsonutil"
-	"github.com/keybase/go-crypto/openpgp"
 )
 
 const (
diff --git a/helper/pgpkeys/keybase_test.go b/helper/pgpkeys/keybase_test.go
index c261e6f14..3faa3f5d8 100644
--- a/helper/pgpkeys/keybase_test.go
+++ b/helper/pgpkeys/keybase_test.go
@@ -7,8 +7,8 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/keybase/go-crypto/openpgp"
-	"github.com/keybase/go-crypto/openpgp/packet"
+	"github.com/ProtonMail/go-crypto/openpgp"
+	"github.com/ProtonMail/go-crypto/openpgp/packet"
 )
 
 func TestFetchKeybasePubkeys(t *testing.T) {
diff --git a/vault/seal.go b/vault/seal.go
index 1fdfcacef..abe350c5b 100644
--- a/vault/seal.go
+++ b/vault/seal.go
@@ -12,11 +12,11 @@ import (
 	"github.com/hashicorp/vault/sdk/helper/jsonutil"
 	"github.com/hashicorp/vault/sdk/physical"
 
+	"github.com/ProtonMail/go-crypto/openpgp"
+	"github.com/ProtonMail/go-crypto/openpgp/packet"
 	"github.com/golang/protobuf/proto"
 	wrapping "github.com/hashicorp/go-kms-wrapping/v2"
 	"github.com/hashicorp/vault/vault/seal"
-	"github.com/keybase/go-crypto/openpgp"
-	"github.com/keybase/go-crypto/openpgp/packet"
 )
 
 const (