diff --git a/Cargo.lock b/Cargo.lock
index 3928978..9e18965 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1924,10 +1924,12 @@ name = "youmubot-core"
 version = "0.1.0"
 dependencies = [
  "chrono 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-util 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.110 (registry+https://github.com/rust-lang/crates.io-index)",
- "serenity 0.8.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serenity 0.9.0-rc.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "static_assertions 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio 0.2.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "youmubot-db 0.1.0",
  "youmubot-prelude 0.1.0",
 ]
diff --git a/youmubot-core/Cargo.toml b/youmubot-core/Cargo.toml
index 407431c..4218f4e 100644
--- a/youmubot-core/Cargo.toml
+++ b/youmubot-core/Cargo.toml
@@ -7,11 +7,13 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-serenity = "0.8"
+serenity = { version = "0.9.0-rc.0", features = ["collector"] }
 rand = "0.7"
 serde = { version = "1", features = ["derive"] }
 chrono = "0.4"
 static_assertions = "1.1"
+futures-util = "0.3"
+tokio = { version = "0.2", features = ["time"] }
 
 youmubot-db = { path = "../youmubot-db" }
 youmubot-prelude = { path = "../youmubot-prelude" }