diff --git a/Cargo.toml b/Cargo.toml
index 2b01f9d8..1ecd8ba2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,14 +1,14 @@
 [package]
 name = "indexmap"
 edition = "2021"
-version = "1.9.0"
+version = "1.9.1"
 documentation = "https://docs.rs/indexmap/"
 repository = "https://github.com/bluss/indexmap"
 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 = "1.56.1"
+rust-version = "1.56"
 
 [lib]
 bench = false
diff --git a/README.md b/README.md
index a1167985..d80b7099 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-1.56.1%2B-orange.svg)](https://img.shields.io/badge/rust-1.56.1%2B-orange.svg)
+[![rustc](https://img.shields.io/badge/rust-1.56%2B-orange.svg)](https://img.shields.io/badge/rust-1.56%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 ef33190e..5b1d23a1 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,9 @@
+- 1.9.1
+
+  - The MSRV now allows Rust 1.56.0 as well. However, currently `hashbrown`
+    0.12.1 requires 1.56.1, so users on 1.56.0 should downgrade that to 0.12.0
+    until there is a later published version relaxing its requirement.
+
 - 1.9.0
 
   - **MSRV**: Rust 1.56.1 or later is now required.
diff --git a/src/lib.rs b/src/lib.rs
index cbca4b0b..ba613342 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -53,7 +53,7 @@
 //!
 //! ### Rust Version
 //!
-//! This version of indexmap requires Rust 1.56.1 or later.
+//! This version of indexmap requires Rust 1.56 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