diff --git a/CHANGELOG.md b/CHANGELOG.md
index ad03ebe..f5ba688 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,15 @@
 CHANGELOG
 =========
 
+# v2.0.0
+
+- Set Rust edition to 2018
+- Make `rand` and `rand_core` dependencies more flexible
+  - Increase maximum version in constraint
+  - Make `rand_core` optional too
+  - Expose both crates
+- Bump MSRV to 1.41.1
+
 # v1.2.0
 
 - Add `Mnemonic::parse_in_normalized_without_checksum_check`
diff --git a/Cargo.toml b/Cargo.toml
index 1786136..c092b04 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bip39"
-version = "1.2.0"
+version = "2.0.0"
 authors = ["Steven Roose <steven@stevenroose.org>"]
 license = "CC0-1.0"
 homepage = "https://github.com/rust-bitcoin/rust-bip39/"
@@ -9,14 +9,12 @@ documentation = "https://docs.rs/bip39/"
 description = "Library for BIP-39 Bitcoin mnemonic codes"
 keywords = [ "crypto", "bitcoin", "bip39", "mnemonic" ]
 readme = "README.md"
-
-[lib]
-name = "bip39"
-path = "src/lib.rs"
+edition = "2018"
 
 [features]
 default = [ "std" ]
 std = [ "unicode-normalization", "serde/std" ]
+rand = [ "crate_rand", "rand_core" ]
 
 # Note: English is the standard for bip39 so always included
 chinese-simplified = []
@@ -40,16 +38,19 @@ all-languages = [
 ]
 
 [dependencies]
-bitcoin_hashes = { version = "0.11.0", default-features = false }
-rand_core = "0.4.0"
-
-unicode-normalization = { version = "=0.1.9", optional = true }
-rand = { version = "0.6.0", optional = true }
+rand_core = { version = ">=0.4.0, <0.7.0", optional = true }
+crate_rand = { package = "rand", version = ">=0.6.0, <0.9.0", optional = true }
 serde = { version = "1.0", default-features = false, features = [ "alloc" ], optional = true }
+
 # Enabling this feature raises the MSRV to 1.51
-zeroize = {version = "1.5", features = ["zeroize_derive"], optional = true}
+zeroize = { version = "1.5", features = ["zeroize_derive"], optional = true }
+
+# Unexported dependnecies
+bitcoin_hashes = { version = "0.11.0", default-features = false }
+unicode-normalization = { version = "=0.1.22", optional = true }
 
 [dev-dependencies]
-rand = { version = "0.6.0", optional = false }
+rand_core = { version = "0.6.4", optional = false }
+crate_rand = { package = "rand", version = "0.8.5", optional = false }
 bitcoin_hashes = "0.11.0" # enable default features for test
 
diff --git a/README.md b/README.md
index be035fc..5db3b76 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,6 @@ Use the `all-languages` feature to enable all languages.
 
 ## MSRV
 
-This crate supports Rust v1.29 and up and works with `no_std`.
+This crate supports Rust v1.41.1 and up and works with `no_std`.
 
-If you enable the `zeroize` feature the MSRV becomes 1.51
+If you enable the `zeroize` feature the MSRV becomes 1.51.
diff --git a/src/lib.rs b/src/lib.rs
index 4144865..856ffe6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -31,13 +31,14 @@ pub extern crate core;
 extern crate alloc;
 
 extern crate bitcoin_hashes;
-extern crate rand_core;
 
 #[cfg(feature = "std")]
 extern crate unicode_normalization;
 
+#[cfg(feature = "rand_core")]
+pub extern crate rand_core;
 #[cfg(feature = "rand")]
-extern crate rand;
+pub extern crate crate_rand as rand;
 #[cfg(feature = "serde")]
 pub extern crate serde;
 
@@ -248,14 +249,14 @@ impl Mnemonic {
 	/// Example:
 	///
 	/// ```
-	/// extern crate rand;
 	/// extern crate bip39;
 	///
 	/// use bip39::{Mnemonic, Language};
 	///
-	/// let mut rng = rand::thread_rng();
+	/// let mut rng = bip39::rand::thread_rng();
 	/// let m = Mnemonic::generate_in_with(&mut rng, Language::English, 24).unwrap();
 	/// ```
+	#[cfg(feature = "rand_core")]
 	pub fn generate_in_with<R>(
 		rng: &mut R,
 		language: Language,