diff --git a/src/simulator/Cargo.toml b/src/simulator/Cargo.toml
index 8d46d31a..189d7004 100644
--- a/src/simulator/Cargo.toml
+++ b/src/simulator/Cargo.toml
@@ -34,6 +34,7 @@ members = [
 serde      = { version = "1", features = ["derive"] }
 serde_json = "1"
 getrandom  = "0.2"
+rand       = "0.9"
 
 # Workspace-wide lint configuration — Python-styled Rust.
 # See ~/.claude/instructions/rust-code-standards.md §12 for rationale.
diff --git a/src/simulator/crates/mc-trade/Cargo.toml b/src/simulator/crates/mc-trade/Cargo.toml
index 2470b53f..9f199790 100644
--- a/src/simulator/crates/mc-trade/Cargo.toml
+++ b/src/simulator/crates/mc-trade/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2021"
 [dependencies]
 serde.workspace      = true
 serde_json.workspace = true
+rand.workspace       = true
 
 [lints]
 workspace = true