diff --git a/.clippy.toml b/.clippy.toml
index fc3ef79..97dd653 100644
--- a/.clippy.toml
+++ b/.clippy.toml
@@ -1 +1 @@
-msrv = "1.54.0"  # MSRV
+msrv = "1.56.0"  # MSRV
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb56ab8..483d44a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
     - name: No-default features
       run: cargo test --workspace --no-default-features
   msrv:
-    name: "Check MSRV: 1.54.0"
+    name: "Check MSRV: 1.56.0"
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
@@ -59,7 +59,7 @@ jobs:
     - name: Install Rust
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: 1.54.0  # MSRV
+        toolchain: 1.56.0  # MSRV
         profile: minimal
         override: true
     - uses: Swatinem/rust-cache@v1
@@ -113,7 +113,7 @@ jobs:
     - name: Install Rust
       uses: actions-rs/toolchain@v1
       with:
-        toolchain: 1.54.0  # MSRV
+        toolchain: 1.56.0  # MSRV
         profile: minimal
         override: true
         components: clippy
diff --git a/.github/workflows/rust-next.yml b/.github/workflows/rust-next.yml
index c09fb04..00c8619 100644
--- a/.github/workflows/rust-next.yml
+++ b/.github/workflows/rust-next.yml
@@ -57,9 +57,9 @@ jobs:
     strategy:
       matrix:
         rust:
-        - 1.54.0  # MSRV
+        - 1.56.0  # MSRV
         - stable
-    continue-on-error: ${{ matrix.rust != '1.54.0' }}  # MSRV
+    continue-on-error: ${{ matrix.rust != '1.56.0' }}  # MSRV
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
diff --git a/Cargo.toml b/Cargo.toml
index 7ddb6d1..c049b10 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,8 @@ authors = ["Pascal Hertleif <killercup@gmail.com>"]
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-clique/clap-verbosity-flag"
 readme = "README.md"
-edition = "2018"
+edition = "2021"
+rust-version = "1.56.0"  # MSRV
 include = [
   "src/**/*",
   "Cargo.toml",