diff --git a/Cargo.toml b/Cargo.toml
index 89acfcf0864c8..dc132c4c054fd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -87,7 +87,7 @@ bevy_winit = { path = "crates/bevy_winit", optional = true, version = "0.2.1" }
 bevy_gilrs = { path = "crates/bevy_gilrs", optional = true, version = "0.2.1" }
 
 [dev-dependencies]
-rand = "0.7.3"
+rand = "0.8.4"
 serde = { version = "1", features = ["derive"] }
 log = "0.4"
 
diff --git a/crates/bevy_ecs/Cargo.toml b/crates/bevy_ecs/Cargo.toml
index ccc2135c0662c..7b972cb5a2e64 100644
--- a/crates/bevy_ecs/Cargo.toml
+++ b/crates/bevy_ecs/Cargo.toml
@@ -20,7 +20,7 @@ profiler = []
 bevy_hecs = { path = "hecs", features = ["macros", "serialize"], version = "0.2.1" }
 bevy_tasks = { path = "../bevy_tasks", version = "0.2.1" }
 bevy_utils = { path = "../bevy_utils", version = "0.2.1" }
-rand = "0.7.3"
+rand = "0.8.4"
 fixedbitset = "0.3.1"
 downcast-rs = "1.2.0"
 parking_lot = "0.11.0"
diff --git a/crates/bevy_ecs/hecs/Cargo.toml b/crates/bevy_ecs/hecs/Cargo.toml
index 63befdee89ecc..895adf668ed72 100644
--- a/crates/bevy_ecs/hecs/Cargo.toml
+++ b/crates/bevy_ecs/hecs/Cargo.toml
@@ -31,7 +31,7 @@ bevy_hecs_macros = { path = "macros", version = "0.2.1", optional = true }
 bevy_utils = { path = "../../bevy_utils", version = "0.2.1" }
 lazy_static = { version = "1.4.0", optional = true, features = ["spin_no_std"] }
 serde = { version = "1", features = ["derive"], optional = true}
-rand = "0.7.3"
+rand = "0.8.4"
 
 [dev-dependencies]
 bencher = "0.1.5"