diff --git a/.github/workflows/intel-mkl-sys.yml b/.github/workflows/intel-mkl-sys.yml
index 82a1d183..7ca59efe 100644
--- a/.github/workflows/intel-mkl-sys.yml
+++ b/.github/workflows/intel-mkl-sys.yml
@@ -19,6 +19,12 @@ jobs:
     runs-on: windows-2019
     steps:
       - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: "1.56.0"
+          profile: minimal
+          default: true
+          override: true
       - uses: actions-rs/cargo@v1
         with:
           command: test
@@ -39,6 +45,12 @@ jobs:
     runs-on: macos-10.15
     steps:
       - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: "1.56.0"
+          profile: minimal
+          default: true
+          override: true
       - uses: actions-rs/cargo@v1
         with:
           command: test
@@ -60,9 +72,15 @@ jobs:
           - mkl-dynamic-lp64-seq
           - mkl-dynamic-ilp64-iomp
           - mkl-dynamic-ilp64-seq
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: "1.56.0"
+          profile: minimal
+          default: true
+          override: true
       - uses: actions-rs/cargo@v1
         with:
           command: test
diff --git a/.github/workflows/intel-mkl-tool.yml b/.github/workflows/intel-mkl-tool.yml
index 4af9f472..8cb2fee2 100644
--- a/.github/workflows/intel-mkl-tool.yml
+++ b/.github/workflows/intel-mkl-tool.yml
@@ -14,10 +14,16 @@ jobs:
         os:
           - windows-2019
           - macos-10.15
-          - ubuntu-18.04
+          - ubuntu-22.04
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v1
+    - uses: actions-rs/toolchain@v1
+      with:
+        toolchain: "1.56.0"
+        profile: minimal
+        default: true
+        override: true
     - uses: actions-rs/cargo@v1
       with:
         command: test
@@ -30,7 +36,7 @@ jobs:
       name: cargo-test no-default-features
 
   docker:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index eb1f7158..00dfa704 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -1,4 +1,4 @@
-name: Rust
+name: rust
 
 on:
   push:
@@ -8,10 +8,32 @@ on:
 
 jobs:
   check-format:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v1
+    - uses: actions-rs/toolchain@v1
+      with:
+        toolchain: "1.56.0"
+        profile: minimal
+        components: rustfmt
+        default: true
+        override: true
     - uses: actions-rs/cargo@v1
       with:
         command: fmt
         args: -- --check
+
+  clippy:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v1
+    - uses: actions-rs/toolchain@v1
+      with:
+        toolchain: "1.56.0"
+        profile: minimal
+        components: clippy
+        default: true
+        override: true
+    - uses: actions-rs/cargo@v1
+      with:
+        command: clippy
diff --git a/intel-mkl-src/Cargo.toml b/intel-mkl-src/Cargo.toml
index a95a465a..06f6ffa4 100644
--- a/intel-mkl-src/Cargo.toml
+++ b/intel-mkl-src/Cargo.toml
@@ -4,6 +4,8 @@ version = "0.6.0+mkl2020.1"
 authors = ["Toshiki Teramura <toshiki.teramura@gmail.com>"]
 edition = "2018"
 
+rust-version = "1.56.0" # MSRV is introduced
+
 description = "Redistribution of Intel(R) MKL as a crate"
 repository = "https://github.com/rust-math/intel-mkl-src"
 keywords = ["fft", "blas", "lapack"]
@@ -33,5 +35,5 @@ download = ["intel-mkl-tool/archive"]
 xdg-data-home = []
 
 [build-dependencies]
-anyhow = "1"
+anyhow = "1.0.58"
 intel-mkl-tool = { version = "0.2.0", path = "../intel-mkl-tool", default-features = false }
diff --git a/intel-mkl-sys/Cargo.toml b/intel-mkl-sys/Cargo.toml
index 7248d41d..4e75e3d1 100644
--- a/intel-mkl-sys/Cargo.toml
+++ b/intel-mkl-sys/Cargo.toml
@@ -4,6 +4,8 @@ version = "0.2.0+mkl2020.1"
 authors = ["Toshiki Teramura <toshiki.teramura@gmail.com>"]
 edition = "2018"
 
+rust-version = "1.56.0" # MSRV is introduced
+
 description = "FFI for Intel(R) MKL"
 repository  = "https://github.com/rust-math/intel-mkl-src"
 keywords    = ["ffi"]
@@ -30,9 +32,9 @@ download = ["intel-mkl-src/download"]
 intel-mkl-src = { path = "../intel-mkl-src", version = "0.6.0", default-features = false }
 
 [dev-dependencies]
-criterion = "0.3.0"
-rand = "0.7.2"
-approx = "0.3.2"
+criterion = "0.3.6"
+rand = "0.8.5"
+approx = "0.5.1"
 
 [[bench]]
 name = "cos"
diff --git a/intel-mkl-tool/Cargo.toml b/intel-mkl-tool/Cargo.toml
index 2d621fbd..9bad7ab0 100644
--- a/intel-mkl-tool/Cargo.toml
+++ b/intel-mkl-tool/Cargo.toml
@@ -16,22 +16,22 @@ archive = ["curl", "tar", "zstd"]
 cli     = ["structopt", "archive"]
 
 [dependencies]
-anyhow = "1.0.31"
-derive_more = "0.99.8"
-dirs = "2.0.2"
+anyhow = "1.0.58"
+derive_more = "0.99.17"
+dirs = "4.0.0"
 glob = "0.3.0"
-pkg-config = "0.3.17"
+pkg-config = "0.3.25"
 
 # archive
-curl = { version = "0.4.29", optional = true }
-tar  = { version = "0.4.29", optional = true }
-zstd = { version = "<=0.11, >=0.6",  optional = true }
+curl = { version = "0.4.44", optional = true }
+tar  = { version = "0.4.38", optional = true }
+zstd = { version = "0.11.2", optional = true }
 
 # CLI
-structopt = { version = "0.3.15", optional = true }
+structopt = { version = "0.3.26", optional = true }
 
 [dev-dependencies]
-paste = "0.1.17"
+paste = "1.0.7"
 
 [[bin]]
 name = "intel-mkl-tool"
diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 00000000..3ebf789f
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1 @@
+1.56.0