diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 72f45d1..e4df507 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -97,9 +97,7 @@ jobs:
         env:
           RUSTFLAGS: ${{ env.RUSTFLAGS }} -Zprofile -Ccodegen-units=1 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests
           RUSTDOCFLAGS: ${{ env.RUSTDOCFLAGS }} -Zprofile -Ccodegen-units=1 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests
-        run: |
-          cargo clean
-          cargo test
+        run: cargo test
 
       - name: Gather coverage data
         id: coverage
@@ -127,7 +125,7 @@ jobs:
 
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.61.0
+          toolchain: 1.65.0
           override: true
           profile: minimal
 
diff --git a/Cargo.toml b/Cargo.toml
index c66f659..fe6d710 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name = "inari"
 version = "1.0.0"
 authors = ["Masashi Mizuno"]
 edition = "2021"
-rust-version = "1.61.0"
+rust-version = "1.65.0"
 description = "A Rust implementation of interval arithmetic"
 documentation = "https://docs.rs/inari"
 readme = "README.md"
@@ -36,7 +36,7 @@ cfg-if = "1.0"
 forward_ref = "1.0.0"
 
 [dependencies.gmp-mpfr-sys]
-version = "~1.4"
+version = "1.5"
 default-features = false
 features = ["mpfr"]
 optional = true
@@ -52,7 +52,7 @@ features = ["std"]
 optional = true
 
 [dependencies.rug]
-version = "1.11"
+version = "1.19"
 default-features = false
 features = ["float", "integer", "rational"]
 optional = true
diff --git a/README.md b/README.md
index 15ea346..156dabe 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 [![docs](https://img.shields.io/docsrs/inari)](https://docs.rs/inari)
 [![build](https://img.shields.io/github/actions/workflow/status/unageek/inari/build.yml?branch=main)](https://github.com/unageek/inari/actions?query=branch%3Amaster+workflow%3Abuild)
 [![coverage](https://img.shields.io/coveralls/github/unageek/inari/main)](https://coveralls.io/github/unageek/inari?branch=main)
-[![rustc 1.61+](https://img.shields.io/badge/rustc-1.61%2B-lightgrey)](https://blog.rust-lang.org/2022/05/19/Rust-1.61.0.html)
+[![rustc 1.65+](https://img.shields.io/badge/rustc-1.61%2B-lightgrey)](https://blog.rust-lang.org/2022/11/03/Rust-1.65.0.html)
 
 **inari** is a Rust implementation of [interval arithmetic](https://en.wikipedia.org/wiki/Interval_arithmetic).