diff --git a/forrustts-core/Cargo.toml b/forrustts-core/Cargo.toml
index 0301a838..f27c00a4 100644
--- a/forrustts-core/Cargo.toml
+++ b/forrustts-core/Cargo.toml
@@ -14,7 +14,7 @@ keywords = ["simulation", "tree_sequences", "tskit", "population_genetics"]
 [dependencies]
 thiserror = "1.0"
 # NOTE: automagically adds rand as a cargo feature
-rand = { version = "0.8.5", optional = true }
+rand = { version = "0.9.0", optional = true }
 
 [dev-dependencies]
 proptest = "1.1.0"
diff --git a/forrustts-genetics/Cargo.toml b/forrustts-genetics/Cargo.toml
index eae9de75..125acd49 100644
--- a/forrustts-genetics/Cargo.toml
+++ b/forrustts-genetics/Cargo.toml
@@ -13,5 +13,5 @@ keywords = ["simulation", "tree_sequences", "tskit", "population_genetics"]
 
 [dependencies]
 forrustts-core = { version = "0.1.0", path = "../forrustts-core", features = ["rand"]}
-rand = "0.8.5"
+rand = "0.9.0"
 rand_distr = "0.4.3"