diff --git a/rust-version b/rust-version
index b8ae5e6cbd..a3ec4b911c 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-4268e7ee22935f086b856ef0063a9e22b49aeddb
+c43753f910aae000f8bcb0a502407ea332afc74b
diff --git a/src/bin/cargo-miri.rs b/src/bin/cargo-miri.rs
index cc95eeb7f3..fe30e7d010 100644
--- a/src/bin/cargo-miri.rs
+++ b/src/bin/cargo-miri.rs
@@ -335,7 +335,7 @@ fn main() {
 }
 
 fn in_cargo_miri() {
-    let (subcommand, skip) = match std::env::args().nth(2).deref() {
+    let (subcommand, skip) = match std::env::args().nth(2).as_deref() {
         Some("test") => (MiriCommand::Test, 3),
         Some("run") => (MiriCommand::Run, 3),
         Some("setup") => (MiriCommand::Setup, 3),