diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3894efc..f6f7e64 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,6 +1,12 @@
 name: build
 
-on: [ push, pull_request ]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
   fmt:
@@ -16,17 +22,20 @@ jobs:
       - uses: actions/checkout@v3
       - run: rustup update && rustup component add clippy
       - uses: Swatinem/rust-cache@v2
-      - run: cargo clippy --all-targets
-      - run: cargo clippy --all-targets --all-features
+      - run: cargo clippy --all-targets -- -D warnings -D clippy::all
+      - run: cargo clippy --all-targets --all-features -- -D warnings -D clippy::all
+      - run: cargo clippy --all-targets --no-default-features -- -D warnings -D clippy::all
 
   clippy_msrv:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - run: rustup update && rustup override set 1.58.0 && rustup component add clippy
+      - run: rustup update && rustup override set 1.63.0 && rustup component add clippy && rustup toolchain install nightly
       - uses: Swatinem/rust-cache@v2
-      - run: cargo clippy --all-targets -- -D warnings -D clippy::all
-      - run: cargo clippy --all-targets --all-features -- -D warnings -D clippy::all
+      - run: cargo +nightly update -Z direct-minimal-versions
+      - run: cargo clippy -- -D warnings -D clippy::all
+      - run: cargo clippy --all-features -- -D warnings -D clippy::all
+      - run: cargo clippy --no-default-features -- -D warnings -D clippy::all
 
   test:
     runs-on: ubuntu-latest
@@ -35,10 +44,9 @@ jobs:
       - run: rustup update
       - uses: Swatinem/rust-cache@v2
       - run: cargo build --all-features
-      - run: cargo test --verbose
-      - run: cargo test --verbose --all-features
-        env:
-          RUST_BACKTRACE: 1
+      - run: cargo test
+      - run: cargo test --all-features
+      - run: cargo test --no-default-features
 
   rustdoc:
     runs-on: ubuntu-latest
@@ -47,14 +55,6 @@ jobs:
       - run: rustup update
       - uses: Swatinem/rust-cache@v2
       - run: cargo doc --all-features --no-deps
-
-  rustdoc_msrv:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - run: rustup update && rustup override set 1.58.0
-      - uses: Swatinem/rust-cache@v2
-      - run: cargo doc --all-features --no-deps
         env:
           RUSTDOCFLAGS: -D warnings
 
diff --git a/Cargo.toml b/Cargo.toml
index f566ab9..320d04f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ description = """
 Simple and fast implementation of language tag normalization and validation
 """
 edition = "2018"
-rust-version = "1.58"
+rust-version = "1.63"
 
 [features]
 default = ["std"]
@@ -22,10 +22,10 @@ alloc = ["serde?/alloc"]
 serialize = ["dep:serde"]
 
 [dependencies]
-serde = { version = "1", optional = true, default_features = false }
+serde = { version = "1.0.100", optional = true, default_features = false }
 
 [dev-dependencies]
-criterion = "0.4"
+criterion = ">=0.4,<0.6"
 serde_test = "1"
 
 [[bench]]
diff --git a/README.md b/README.md
index 933e8e0..40f72c7 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,11 @@ assert_eq!(language_tag.extension(), None);
 assert_eq!(language_tag.private_use_subtags().collect::<Vec<_>>(), vec!["test"]);
 ```
 
+It is also possible to use this crate in `no_std` (with `alloc`) by opting-out of the default `std` feature:
+```toml
+serde = { version = "*", default-features = false }
+```
+
 ## License
 
 This project is licensed under the MIT license ([LICENSE-MIT](LICENSE-MIT) or `<http://opensource.org/licenses/MIT>`).