diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ac1d07a..9ee97e5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -70,5 +70,5 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.68.2
+          toolchain: 1.72.1
       - run: cargo check --all-features
diff --git a/Cargo.toml b/Cargo.toml
index 204a04b..686fa09 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "astro-rs"
 version = "0.1.1"
 edition = "2021"
-rust-version = "1.68.2"
+rust-version = "1.72.1"
 license = "MIT"
 description = "Astronomy utils"
 repository = "https://github.com/eta077/astro-rs"
diff --git a/README.md b/README.md
index dd78e71..1627af5 100644
--- a/README.md
+++ b/README.md
@@ -29,4 +29,4 @@ Test assets are from the following sources:
 * `hifitime` is licensed under Apache-2.0
 
 # MSRV
-This crate's Minimum Supported Rust Version is `1.68.2`.
+This crate's Minimum Supported Rust Version is `1.72.1`.