diff --git a/gcpkms/go.mod b/gcpkms/go.mod
index 6ef66bf..c5d3c5d 100644
--- a/gcpkms/go.mod
+++ b/gcpkms/go.mod
@@ -1,12 +1,14 @@
 module github.com/retailnext/agekms/gcpkms
 
-go 1.19
+go 1.21
+
+toolchain go1.23.3
 
 require (
 	cloud.google.com/go/kms v1.10.1
 	filippo.io/age v1.0.0
 	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1
-	google.golang.org/protobuf v1.33.0
+	google.golang.org/protobuf v1.35.2
 )
 
 require (
diff --git a/gcpkms/go.sum b/gcpkms/go.sum
index 8f4e96c..ea4cf6c 100644
--- a/gcpkms/go.sum
+++ b/gcpkms/go.sum
@@ -134,6 +134,8 @@ google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp0
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
 google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
+google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=