diff --git a/Cargo.toml b/Cargo.toml
index 22dcf292..81ced1b3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ nonempty = { version = "0.10.0", features = ["serialize"] }
 pretty_assertions = "1.4"
 proptest = "1.6"
 proptest-arbitrary-interop = "0.1.0"
-rand = "0.9.1"
+rand = "0.10.0"
 rsa = { version = "0.9.8", features = ["sha2"] }
 serde = { version = "1.0", features = ["derive", "rc"] }
 serde_ipld_dagcbor = "0.6.3"
diff --git a/varsig/Cargo.toml b/varsig/Cargo.toml
index b22e5290..802e9fad 100644
--- a/varsig/Cargo.toml
+++ b/varsig/Cargo.toml
@@ -34,7 +34,7 @@ thiserror.workspace = true
 tracing.workspace = true
 
 [dev-dependencies]
-rand = "0.8.5"
+rand = "0.10.0"
 testresult = "0.4.1"
 
 [features]