diff --git a/Cargo.toml b/Cargo.toml
index c3ae7d556..649215af2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "smoltcp"
 version = "0.12.0"
 edition = "2021"
-rust-version = "1.80"
+rust-version = "1.81"
 authors = ["whitequark <whitequark@whitequark.org>"]
 description = "A TCP/IP stack designed for bare-metal, real-time systems without a heap."
 documentation = "https://docs.rs/smoltcp/"
diff --git a/README.md b/README.md
index 45c4c4970..deb4bcdc8 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ include complicated compile-time computations, such as macro or type tricks, eve
 at cost of performance degradation.
 
 _smoltcp_ does not need heap allocation *at all*, is [extensively documented][docs],
-and compiles on stable Rust 1.80 and later.
+and compiles on stable Rust 1.81 and later.
 
 _smoltcp_ achieves [~Gbps of throughput](#examplesbenchmarkrs) when tested against
 the Linux TCP stack in loopback mode.
diff --git a/ci.sh b/ci.sh
index 0a947d2b7..0da50ac3a 100755
--- a/ci.sh
+++ b/ci.sh
@@ -4,7 +4,7 @@ set -eox pipefail
 
 export DEFMT_LOG=trace
 
-MSRV="1.80.0"
+MSRV="1.81.0"
 
 RUSTC_VERSIONS=(
     $MSRV
diff --git a/src/lib.rs b/src/lib.rs
index 4b1073501..0f81a7474 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -65,7 +65,7 @@
 //!
 //! # Minimum Supported Rust Version (MSRV)
 //!
-//! This crate is guaranteed to compile on stable Rust 1.80 and up with any valid set of features.
+//! This crate is guaranteed to compile on stable Rust 1.81 and up with any valid set of features.
 //! It *might* compile on older versions but that may change in any new patch release.
 //!
 //! The exception is when using the `defmt` feature, in which case `defmt`'s MSRV applies, which