diff --git a/metropolis/proto/api/BUILD.bazel b/metropolis/proto/api/BUILD.bazel
index 66ab06a..f573105 100644
--- a/metropolis/proto/api/BUILD.bazel
+++ b/metropolis/proto/api/BUILD.bazel
@@ -12,10 +12,10 @@
     ],
     visibility = ["//visibility:public"],
     deps = [
-        "//metropolis/pkg/logtree/proto:proto_proto",
         "//metropolis/proto/common:common_proto",
         "//metropolis/proto/ext:ext_proto",
         "//net/proto:net_proto_proto",
+        "//osbase/logtree/proto:proto_proto",
         "@com_google_protobuf//:duration_proto",
     ],
 )
@@ -27,10 +27,10 @@
     proto = ":api_proto",
     visibility = ["//visibility:public"],
     deps = [
-        "//metropolis/pkg/logtree/proto",
         "//metropolis/proto/common",
         "//metropolis/proto/ext",
         "//net/proto",
+        "//osbase/logtree/proto",
     ],
 )
 
diff --git a/metropolis/proto/api/management.proto b/metropolis/proto/api/management.proto
index 421898a..cd95a8e 100644
--- a/metropolis/proto/api/management.proto
+++ b/metropolis/proto/api/management.proto
@@ -4,7 +4,7 @@
 
 import "google/protobuf/duration.proto";
 
-import "metropolis/pkg/logtree/proto/logtree.proto";
+import "osbase/logtree/proto/logtree.proto";
 import "metropolis/proto/common/common.proto";
 import "metropolis/proto/ext/authorization.proto";
 
@@ -334,7 +334,7 @@
   // GetLogs Returns historical and/or streaming logs for a given DN with given
   // filters from the system global LogTree.
   //
-  // For more information about this API, see //metropolis/pkg/logtree. But, in
+  // For more information about this API, see //osbase/logtree. But, in
   // summary:
   //   - All logging is performed to a DN (distinguished name), which is a
   //     dot-delimited string like foo.bar.baz.
@@ -398,11 +398,11 @@
 message GetLogsResponse {
   // Entries from the requested historical entries (via WithBackLog). They will
   // all be served before the first stream_entries are served (if any).
-  repeated metropolis.pkg.logtree.proto.LogEntry backlog_entries = 1;
+  repeated osbase.pkg.logtree.proto.LogEntry backlog_entries = 1;
   // Entries streamed as they arrive. Currently no server-side buffering is
   // enabled, instead every line is served as early as it arrives. However, this
   // might change in the future, so this behaviour cannot be depended upon.
-  repeated metropolis.pkg.logtree.proto.LogEntry stream_entries = 2;
+  repeated osbase.pkg.logtree.proto.LogEntry stream_entries = 2;
 }
 
 enum ActivationMode {
diff --git a/metropolis/proto/common/BUILD.bazel b/metropolis/proto/common/BUILD.bazel
index 10f7f84..f895f44 100644
--- a/metropolis/proto/common/BUILD.bazel
+++ b/metropolis/proto/common/BUILD.bazel
@@ -7,7 +7,7 @@
     srcs = ["common.proto"],
     visibility = ["//metropolis:__subpackages__"],
     deps = [
-        "//metropolis/pkg/logtree/proto:proto_proto",
+        "//osbase/logtree/proto:proto_proto",
         "//version/spec:spec_proto",
         "@com_google_protobuf//:timestamp_proto",
     ],
@@ -19,7 +19,7 @@
     proto = ":common_proto",
     visibility = ["//metropolis:__subpackages__"],
     deps = [
-        "//metropolis/pkg/logtree/proto",
+        "//osbase/logtree/proto",
         "//version/spec",
     ],
 )
diff --git a/metropolis/proto/common/common.proto b/metropolis/proto/common/common.proto
index a0e8c73..758631f 100644
--- a/metropolis/proto/common/common.proto
+++ b/metropolis/proto/common/common.proto
@@ -21,7 +21,7 @@
 import "google/protobuf/timestamp.proto";
 import "version/spec/spec.proto";
 
-import "metropolis/pkg/logtree/proto/logtree.proto";
+import "osbase/logtree/proto/logtree.proto";
 
 // NodeRoles are the possible roles that a Metropolis Node should run within the
 // cluster. These are configured by the cluster and can be retrieved through the
@@ -252,7 +252,7 @@
     // If leveled logs are returned, all entries at severity lower than `minimum`
     // will be discarded.
     message LeveledWithMinimumSeverity {
-        metropolis.pkg.logtree.proto.LeveledLogSeverity minimum = 1;
+        osbase.pkg.logtree.proto.LeveledLogSeverity minimum = 1;
     }
     oneof filter {
         WithChildren with_children = 1;