diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 61a4fd1..af7d36d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,9 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: true
+    - run: rustup toolchain install 1.64.0
     - uses: Swatinem/rust-cache@v2
+    - run: rustc --version
     - name: Build debug
       run: cargo build --verbose
     - name: Build release
@@ -35,11 +37,13 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: true
+    - run: rustup toolchain install 1.64.0
     - uses: Swatinem/rust-cache@v2
     - name: Install dependencies
       run: |
         sudo apt-get update
         sudo apt-get install --yes libmysqlclient-dev
+    - run: rustc --version
     - name: Run tests
       run: cargo test -F build-with-mysql
 
@@ -49,11 +53,13 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: true
+    - run: rustup toolchain install 1.64.0
     - uses: Swatinem/rust-cache@v2
     - name: Install dependencies
       run: |
         sudo apt-get update
         sudo apt-get install --yes libpq-dev
+    - run: rustc --version
     - name: Run tests
       run: cargo test -F build-with-postgres
 
diff --git a/README.md b/README.md
index accfbca..2640bd7 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Quick fix binding for Rust
 
 ![CI workflow](https://github.com/arthurlm/quickfix-rs/actions/workflows/ci.yml/badge.svg)
+![MSRV](https://img.shields.io/badge/MSRV-1.64.0-blue)
 [![dependency status](https://deps.rs/repo/github/arthurlm/quickfix-rs/status.svg)](https://deps.rs/repo/github/arthurlm/quickfix-rs)
 
 This project is an **unofficial** binding between [quickfix](https://github.com/quickfix/quickfix) library and Rust projects.
diff --git a/quickfix-ffi/Cargo.toml b/quickfix-ffi/Cargo.toml
index e547aac..f38cfa8 100644
--- a/quickfix-ffi/Cargo.toml
+++ b/quickfix-ffi/Cargo.toml
@@ -8,6 +8,7 @@ repository = "https://github.com/arthurlm/quickfix-rs"
 license = "MIT"
 keywords = ["quickfix", "fix-protocol", "finance"]
 categories = ["external-ffi-bindings"]
+rust-version = "1.64.0"
 exclude = ["examples"]
 
 [dependencies]
diff --git a/quickfix/Cargo.toml b/quickfix/Cargo.toml
index b590724..827850d 100644
--- a/quickfix/Cargo.toml
+++ b/quickfix/Cargo.toml
@@ -8,6 +8,7 @@ repository = "https://github.com/arthurlm/quickfix-rs"
 license = "MIT"
 keywords = ["quickfix", "fix-protocol", "finance"]
 categories = ["api-bindings", "finance"]
+rust-version = "1.64.0"
 
 [dependencies]
 quickfix-ffi = { path = "../quickfix-ffi", version = "0.1.0" }