diff --git a/flake.nix b/flake.nix
index 82b380de..8bc01f87 100644
--- a/flake.nix
+++ b/flake.nix
@@ -45,7 +45,7 @@
 
               overlays = [ rust-overlay.overlays.default ];
             };
-            rust-bin = pkgs.rust-bin.nightly."2025-10-03".default.override {
+            rust-bin = pkgs.rust-bin.nightly."2026-05-24".default.override {
               extensions = [
                 "rust-analyzer"
                 "rust-src"
diff --git a/mk/prefix.mk b/mk/prefix.mk
index 8ece13c7..7464dbd2 100644
--- a/mk/prefix.mk
+++ b/mk/prefix.mk
@@ -26,8 +26,7 @@ LIBCURL_TARGET=recipes/net/download/curl/target/$(HOST_TARGET)/$(TARGET)
 LIBGCC_TARGET=recipes/libs/libgcc/target/$(TARGET)
 LIBCPP_TARGET=recipes/libs/libstdcxx/target/$(TARGET)
 
-# official RISC-V support introduced in newer version
-UPSTREAM_RUSTC_VERSION=2025-11-15
+UPSTREAM_RUSTC_VERSION=2026-05-24
 
 export PREFIX_RUSTFLAGS=-L $(ROOT)/$(PREFIX_INSTALL)/$(TARGET)/lib
 export RUSTUP_TOOLCHAIN=$(ROOT)/$(PREFIX_INSTALL)
diff --git a/recipes/dev/rust/recipe.toml b/recipes/dev/rust/recipe.toml
index 020909b2..ab51c2cc 100644
--- a/recipes/dev/rust/recipe.toml
+++ b/recipes/dev/rust/recipe.toml
@@ -1,6 +1,6 @@
 [source]
 git = "https://gitlab.redox-os.org/redox-os/rust.git"
-branch = "redox-2025-10-03"
+branch = "redox-2026-05-24"
 shallow_clone = true
 
 [build]
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 306bdf6f..2a2f67c4 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,4 +1,4 @@
 [toolchain]
-channel = "nightly-2025-10-03"
+channel = "nightly-2026-05-24"
 components = ["rust-src", "rustfmt", "clippy"]
 profile = "minimal"