diff --git a/go.mod b/go.mod
index 5ec8554..c96a500 100644
--- a/go.mod
+++ b/go.mod
@@ -6,6 +6,6 @@ require (
 	cwtch.im/tapir v0.1.18
 	git.openprivacy.ca/openprivacy/connectivity v1.1.1
 	git.openprivacy.ca/openprivacy/log v1.0.0
-	github.com/golang/protobuf v1.4.0
+	github.com/golang/protobuf v1.3.5
 	golang.org/x/crypto v0.0.0-20200420104511-884d27f42877
 )
diff --git a/go.sum b/go.sum
index 3d3ebcf..a827595 100644
--- a/go.sum
+++ b/go.sum
@@ -10,6 +10,8 @@ github.com/cretz/bine v0.1.1-0.20200124154328-f9f678b84cca/go.mod h1:6PF6fWAvYtw
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/golang/protobuf v1.3.5 h1:F768QJ1E9tib+q5Sc8MkdJi1RxLTbRcTf8LJV56aRls=
+github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
 github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=