diff --git a/Taskfile.yml b/Taskfile.yml
index 7ca22da..b129cd4 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -243,10 +243,11 @@ tasks:
   gen-datasets:
     desc: >-
       Regenerate benchmark datasets from the gen-datasets binary. Uses a fixed
-      RNG seed, so api_response.pb and analytics_event.pb are byte-reproducible.
-      log_record.pb is NOT — its map<string,string> field encodes in HashMap
-      iteration order (random per process). Don't commit log_record.pb churn
-      unless the schema or generator logic changed.
+      RNG seed, so api_response.pb, analytics_event.pb, and
+      google_message1_proto3.pb are byte-reproducible. log_record.pb and
+      media_frame.pb are NOT — their map fields encode in HashMap iteration
+      order (random per process). Don't commit log_record.pb or media_frame.pb
+      churn unless the schema or generator logic changed.
     dir: benchmarks/gen-datasets
     cmds:
       - cargo run
diff --git a/benchmarks/gen-datasets/Cargo.lock b/benchmarks/gen-datasets/Cargo.lock
index 8e8705e..6750552 100644
--- a/benchmarks/gen-datasets/Cargo.lock
+++ b/benchmarks/gen-datasets/Cargo.lock
@@ -255,9 +255,9 @@ checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
 [[package]]
 name = "rand"
-version = "0.9.2"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
+checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
 dependencies = [
  "rand_chacha",
  "rand_core",