diff --git a/Cargo.toml b/Cargo.toml
index c99c03429f56a062185faf2bef8a39a49610a6e9..7f1c0977356facc5e1c5172b72158ca317a93aca 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,8 +11,8 @@ crate-type = ["cdylib", "rlib"]
 bincode = "1.3.3"
 getrandom = { version = "*", features = ["js"] } # Allow rand to get random numbers.
 js-sys = "0.3.58"
-rand = "0.8.5"
-rand_pcg = { version = "0.3.1", features = ["serde1"] }
+rand = "0.9.0"
+rand_pcg = { version = "0.9.0", features = ["serde1"] }
 rmp-serde = "1.1.0"
 serde = "1.0.143"
 serde_derive = "1.0.143"
diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
index db683db454e78ca72af0980948dd8f8f38d87f05..e07962dde755ce2336340004ac2dbd991e03edf9 100644
--- a/fuzz/Cargo.toml
+++ b/fuzz/Cargo.toml
@@ -9,7 +9,7 @@ edition = "2018"
 cargo-fuzz = true
 
 [dependencies]
-rand = "0.8.5"
+rand = "0.9.0"
 
 [dependencies.tiles]
 path = ".."