diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8c6c10c..4cc1a76 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - rust: 1.56.0 # MSRV
+          - rust: 1.56.1 # MSRV
             features:
           - rust: stable
             features: serde
@@ -59,7 +59,7 @@ jobs:
     strategy:
       matrix:
         include:
-          - rust: 1.56.0
+          - rust: 1.56.1
             target: thumbv6m-none-eabi
           - rust: stable
             target: thumbv6m-none-eabi
diff --git a/Cargo.toml b/Cargo.toml
index b75c9a5..2b01f9d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ license = "Apache-2.0 OR MIT"
 description = "A hash table with consistent order and fast iteration."
 keywords = ["hashmap", "no_std"]
 categories = ["data-structures", "no-std"]
-rust-version = "1.56"
+rust-version = "1.56.1"
 
 [lib]
 bench = false
diff --git a/README.md b/README.md
index 5dc3f18..de7ab33 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![build status](https://github.com/bluss/indexmap/workflows/Continuous%20integration/badge.svg?branch=master)](https://github.com/bluss/indexmap/actions)
 [![crates.io](https://img.shields.io/crates/v/indexmap.svg)](https://crates.io/crates/indexmap)
 [![docs](https://docs.rs/indexmap/badge.svg)](https://docs.rs/indexmap)
-[![rustc](https://img.shields.io/badge/rust-1.56%2B-orange.svg)](https://img.shields.io/badge/rust-1.56%2B-orange.svg)
+[![rustc](https://img.shields.io/badge/rust-1.56.1%2B-orange.svg)](https://img.shields.io/badge/rust-1.56.1%2B-orange.svg)
 
 A pure-Rust hash table which preserves (in a limited sense) insertion order.
 
diff --git a/RELEASES.md b/RELEASES.md
index 2aa3528..c4d05f9 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,6 +1,6 @@
 - 1.9.0
 
-  - **MSRV**: Rust 1.56 or later is now required.
+  - **MSRV**: Rust 1.56.1 or later is now required.
 
   - The `hashbrown` dependency has been updated to version 0.12.
 
diff --git a/src/lib.rs b/src/lib.rs
index ba61334..cbca4b0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -53,7 +53,7 @@
 //!
 //! ### Rust Version
 //!
-//! This version of indexmap requires Rust 1.56 or later.
+//! This version of indexmap requires Rust 1.56.1 or later.
 //!
 //! The indexmap 1.x release series will use a carefully considered version
 //! upgrade policy, where in a later 1.x version, we will raise the minimum