diff --git a/fixed-hash/Cargo.toml b/fixed-hash/Cargo.toml
index 337dad70..b1023533 100644
--- a/fixed-hash/Cargo.toml
+++ b/fixed-hash/Cargo.toml
@@ -9,7 +9,7 @@ description = "Macros to define custom fixed-size hash types"
 documentation = "https://docs.rs/fixed-hash/"
 readme = "README.md"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.60"
 
 [package.metadata.docs.rs]
 features = ["quickcheck", "api-dummy"]
@@ -29,7 +29,7 @@ rand = { version = "0.8.0", default-features = false, features = ["std_rng"] }
 
 [features]
 default = ["std", "rand", "rustc-hex", "byteorder"]
-std = ["rustc-hex/std", "rand/std", "byteorder/std"]
+std = ["rustc-hex/std", "rand?/std", "byteorder/std"]
 
 api-dummy = [] # Feature used by docs.rs to display documentation of hash types
 
diff --git a/primitive-types/Cargo.toml b/primitive-types/Cargo.toml
index 1c861d36..d7d93c4f 100644
--- a/primitive-types/Cargo.toml
+++ b/primitive-types/Cargo.toml
@@ -24,8 +24,9 @@ serde_json = { version = "1.0", default-features = false }
 jsonschema = { version = "0.17", default-features = false }
 
 [features]
-default = ["std"]
+default = ["std", "rand"]
 std = ["uint/std", "fixed-hash/std", "impl-codec?/std"]
+rand = ["fixed-hash/rand"]
 byteorder = ["fixed-hash/byteorder"]
 rustc-hex = ["fixed-hash/rustc-hex"]
 serde = ["std", "impl-serde", "impl-serde/std"]