diff --git a/metropolis/proto/api/BUILD.bazel b/metropolis/proto/api/BUILD.bazel
index d9e94e1..a1d681b 100644
--- a/metropolis/proto/api/BUILD.bazel
+++ b/metropolis/proto/api/BUILD.bazel
@@ -16,7 +16,6 @@
         "//metropolis/proto/ext:ext_proto",
         "//net/proto:net_proto_proto",
         "@com_google_protobuf//:duration_proto",
-        "@com_google_protobuf//:timestamp_proto",
     ],
 )
 
diff --git a/metropolis/proto/api/debug.proto b/metropolis/proto/api/debug.proto
index b70d1a0..e5529f9 100644
--- a/metropolis/proto/api/debug.proto
+++ b/metropolis/proto/api/debug.proto
@@ -18,7 +18,6 @@
 package metropolis.proto.api;
 option go_package = "source.monogon.dev/metropolis/proto/api";
 
-import "google/protobuf/timestamp.proto";
 import "metropolis/proto/api/management.proto";
 
 // NodeDebugService exposes debug and testing endpoints that allow introspection into a running Metropolis node.
diff --git a/metropolis/proto/api/management.proto b/metropolis/proto/api/management.proto
index a08f5cb..bdb4a03 100644
--- a/metropolis/proto/api/management.proto
+++ b/metropolis/proto/api/management.proto
@@ -3,7 +3,6 @@
 option go_package = "source.monogon.dev/metropolis/proto/api";
 
 import "google/protobuf/duration.proto";
-import "google/protobuf/timestamp.proto";
 
 import "metropolis/proto/common/common.proto";
 import "metropolis/proto/ext/authorization.proto";