diff --git a/Cargo.toml b/Cargo.toml
index 25c665118..241149edb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,14 +23,14 @@ travis-ci = { repository = "slide-rs/specs" }
 
 [dependencies]
 crossbeam-queue = "0.3"
-hashbrown = "0.7.0"
+hashbrown = "0.9.0"
 hibitset = { version = "0.6.3", default-features = false }
 log = "0.4.8"
 shred = { version = "0.10.2", default-features = false }
 shrev = "1.1.1"
 tuple_utils = "0.3.0"
 
-rayon = { version = "1.3.0", optional = true }
+rayon = { version = "1.5.0", optional = true }
 serde = { version = "1.0.104", optional = true, features = ["serde_derive"] }
 specs-derive = { version = "0.4.1", path = "specs-derive", optional = true }
 uuid = { version = "0.8.1", optional = true, features = ["v4", "serde"] }