diff --git a/Cargo.lock b/Cargo.lock
index d0c51985..e66e193a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -79,7 +79,7 @@ checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
 
 [[package]]
 name = "getrandom"
-version = "0.4.0-rc.0"
+version = "0.4.0-rc.1"
 dependencies = [
  "cfg-if",
  "js-sys",
@@ -254,9 +254,9 @@ checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
 [[package]]
 name = "rand_core"
-version = "0.10.0-rc-4"
+version = "0.10.0-rc-6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43bb1e3655c24705492d72208c9bacdefe07c30c14b8f7664c556a3e1953b72c"
+checksum = "70765ff7112b0fb2d272d24d9a2f907fc206211304328fe58b2db15a5649ef28"
 
 [[package]]
 name = "rustversion"
diff --git a/Cargo.toml b/Cargo.toml
index d12a113b..3a9a2d39 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "getrandom"
-version = "0.4.0-rc.0"
+version = "0.4.0-rc.1"
 edition = "2024"
 rust-version = "1.85" # Sync tests.yml and README.md.
 authors = ["The Rand Project Developers"]
@@ -37,7 +37,7 @@ sys_rng = ["dep:rand_core"]
 
 [dependencies]
 cfg-if = "1"
-rand_core = { version = "0.10.0-rc-3", optional = true }
+rand_core = { version = "0.10.0-rc-6", optional = true }
 
 # getrandom / linux_android_with_fallback
 [target.'cfg(all(any(target_os = "linux", target_os = "android"), not(any(all(target_os = "linux", target_env = ""), getrandom_backend = "custom", getrandom_backend = "linux_raw", getrandom_backend = "rdrand", getrandom_backend = "rndr"))))'.dependencies]
diff --git a/src/sys_rng.rs b/src/sys_rng.rs
index d7c019e1..ba8e35e6 100644
--- a/src/sys_rng.rs
+++ b/src/sys_rng.rs
@@ -1,7 +1,7 @@
 use crate::Error;
-use rand_core::{TryCryptoRng, TryRngCore};
+use rand_core::{TryCryptoRng, TryRng};
 
-/// A [`TryRngCore`] interface over the system's preferred random number source
+/// A [`TryRng`] interface over the system's preferred random number source
 ///
 /// This is a zero-sized struct. It can be freely constructed with just `SysRng`.
 ///
@@ -9,30 +9,30 @@ use rand_core::{TryCryptoRng, TryRngCore};
 ///
 /// # Usage example
 ///
-/// `SysRng` implements [`TryRngCore`]:
+/// `SysRng` implements [`TryRng`]:
 /// ```
-/// use getrandom::{rand_core::TryRngCore, SysRng};
+/// use getrandom::{rand_core::TryRng, SysRng};
 ///
 /// let mut key = [0u8; 32];
 /// SysRng.try_fill_bytes(&mut key).unwrap();
 /// ```
 ///
-/// Using it as an [`RngCore`] is possible using [`TryRngCore::unwrap_err`]:
+/// Using it as an [`Rng`] is possible using [`UnwrapErr`]:
 /// ```
-/// use getrandom::rand_core::{TryRngCore, RngCore};
+/// use getrandom::rand_core::{Rng, UnwrapErr};
 /// use getrandom::SysRng;
 ///
-/// let mut rng = SysRng.unwrap_err();
+/// let mut rng = UnwrapErr(SysRng);
 /// let random_u64 = rng.next_u64();
 /// ```
 ///
 /// [rand]: https://crates.io/crates/rand
 /// [`rand::rngs::SysRng`]: https://docs.rs/rand/latest/rand/rngs/struct.SysRng.html
-/// [`RngCore`]: rand_core::RngCore
+/// [`Rng`]: rand_core::Rng
 #[derive(Clone, Copy, Debug, Default)]
 pub struct SysRng;
 
-impl TryRngCore for SysRng {
+impl TryRng for SysRng {
     type Error = Error;
 
     #[inline]
diff --git a/tests/sys_rng.rs b/tests/sys_rng.rs
index 541912d2..a4299275 100644
--- a/tests/sys_rng.rs
+++ b/tests/sys_rng.rs
@@ -1,7 +1,7 @@
 #![cfg(feature = "sys_rng")]
 
 use getrandom::SysRng;
-use getrandom::rand_core::TryRngCore;
+use getrandom::rand_core::TryRng;
 
 #[test]
 fn test_sys_rng() {