diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eee3180..4676b1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
 name: CI
 
 env:
-  CI_CARGO_MAKE_VERSION: 0.35.6
+  CI_CARGO_MAKE_VERSION: 0.35.8
 
 jobs:
   linux:
@@ -17,10 +17,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: ["1.52.1", "stable"]
+        rust: ["1.56.1", "stable"]
     steps:
-      - name: "Install dependencies"
-        run: sudo apt-get install libncurses5-dev
       - uses: hecrj/setup-rust-action@967aec96c6a27a0ce15c1dac3aaba332d60565e2
         with:
           rust-version: ${{ matrix.rust }}
@@ -47,7 +45,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        rust: ["1.52.1", "stable"]
+        rust: ["1.56.1", "stable"]
     steps:
       - uses: actions/checkout@v1
       - uses: hecrj/setup-rust-action@967aec96c6a27a0ce15c1dac3aaba332d60565e2
diff --git a/Cargo.toml b/Cargo.toml
index 925985e..cb2bd34 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ readme = "README.md"
 license = "MIT"
 exclude = ["assets/*", ".github", "Makefile.toml", "CONTRIBUTING.md", "*.log", "tags"]
 autoexamples = true
-edition = "2018"
+edition = "2021"
 
 [badges]
 
diff --git a/README.md b/README.md
index 2835314..a906db0 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ you may rely on the previously cited libraries to achieve such features.
 
 ### Rust version requirements
 
-Since version 0.17.0, `tui` requires **rustc version 1.52.1 or greater**.
+Since version 0.17.0, `tui` requires **rustc version 1.56.1 or greater**.
 
 ### [Documentation](https://docs.rs/tui)