diff --git a/tvix/nar-bridge/default.nix b/tvix/nar-bridge/default.nix
index 0261460a4..b3ef1481f 100644
--- a/tvix/nar-bridge/default.nix
+++ b/tvix/nar-bridge/default.nix
@@ -6,5 +6,5 @@ pkgs.buildGoModule {
   name = "nar-bridge";
   src = depot.third_party.gitignoreSource ./.;
 
-  vendorHash = "sha256-2WrXRbaJBg8ldL92KzCn/Lj0xp+E/kIYeHE9qsJEXAI=";
+  vendorHash = "sha256-3Ywc6rrt56U5K5mF5muXPMscD38zS5NIiVPpcYcmIYQ=";
 }
diff --git a/tvix/nar-bridge/go.mod b/tvix/nar-bridge/go.mod
index 7856b14a3..96b5704dc 100644
--- a/tvix/nar-bridge/go.mod
+++ b/tvix/nar-bridge/go.mod
@@ -13,7 +13,7 @@ require (
 	github.com/stretchr/testify v1.8.1
 	github.com/ulikunitz/xz v0.5.11
 	google.golang.org/grpc v1.51.0
-	google.golang.org/protobuf v1.28.1
+	google.golang.org/protobuf v1.31.0
 	lukechampine.com/blake3 v1.1.7
 )
 
diff --git a/tvix/nar-bridge/go.sum b/tvix/nar-bridge/go.sum
index 2bba1bd37..4b923d4e1 100644
--- a/tvix/nar-bridge/go.sum
+++ b/tvix/nar-bridge/go.sum
@@ -120,8 +120,8 @@ google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
-google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 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=