diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index fa27d5b..1e0177a 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -13,19 +13,23 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Build
       run: cargo build --verbose
     - name: Run tests
       run: cargo test --verbose
-    - name: Run tests (gecko-ffi)
-      run: cargo test --tests --verbose
+    - name: Run miniserde tests
+      run: cargo test --features miniserde --verbose
+    - name: Run nanoserde tests
+      run: cargo test --features nanoserde --verbose
+    - name: Run borsh tests
+      run: cargo test --features borsh --verbose
       
   miri:
     name: "Miri"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Install Miri
         run: |
           rustup toolchain install nightly --component miri
@@ -37,51 +41,64 @@ jobs:
   fmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
-          profile: minimal
           components: rustfmt
-          override: true
-      - uses: actions-rs/cargo@v1
+      - run: cargo fmt --all -- --check
+
+  msrv:
+    name: Rust ${{matrix.rust}}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        rust: [1.0.0, 1.1.0]
+    timeout-minutes: 45
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@master
         with:
-          command: fmt
-          args: --all -- --check
-          
-          
+          toolchain: ${{matrix.rust}}
+      - run: cargo build
+      - run: cargo test
+
+  msrv-serde:
+    name: Rust ${{matrix.rust}}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        rust: [1.31.0, 1.32.0]
+    timeout-minutes: 45
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{matrix.rust}}
+      - run: cargo build
+      - run: cargo test
+      - run: cargo test --features serde
+
   clippy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
         with:
             toolchain: stable
-            profile: minimal
             components: clippy
-            override: true
-      - uses: actions-rs/clippy-check@v1
-        env:
-          PWD: ${{ env.GITHUB_WORKSPACE }}
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          args: --workspace --tests --examples
-          
-          
+      - run: cargo clippy --workspace --tests --examples
+
   docs:
     runs-on: ubuntu-latest
     env:
       RUSTDOCFLAGS: -Dwarnings
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
-          profile: minimal
-          components: rust-docs
-          override: true
-      - uses: swatinem/rust-cache@v1
-      - uses: actions-rs/cargo@v1
-        with:
-          command: doc
-          args: --workspace --no-deps
+      - uses: swatinem/rust-cache@v2
+      - run: cargo doc --workspace --no-deps
diff --git a/Cargo.toml b/Cargo.toml
index 1c443c5..66dc7a4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,7 @@ documentation = "https://docs.rs/bit-vec/"
 keywords = ["data-structures", "bitvec", "bitmask", "bitmap", "bit"]
 readme = "README.md"
 edition = "2015"
+rust-version = "1.0"
 
 [dependencies]
 borsh = { version = "1.5", default-features = false, features = ["derive"], optional = true }
diff --git a/README.md b/README.md
index 2d69953..304cc28 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@
 [crates.io link]: https://crates.io/crates/bit-vec
 [docs.rs badge]: https://docs.rs/bit-vec/badge.svg?version=0.8.0
 [docs.rs link]: https://docs.rs/bit-vec/0.8.0/bit_vec/
-[github ci badge]: https://github.com/contain-rs/linked-hash-map/workflows/Rust/badge.svg?branch=master
+[github ci badge]: https://github.com/contain-rs/bit-vec/workflows/Rust/badge.svg?branch=master
 [rustc 1.0+]: https://img.shields.io/badge/rustc-1.0%2B-blue.svg
 [serde_derive: rustc 1.31+]: https://img.shields.io/badge/serde_derive-rustc_1.31+-lightgray.svg
 [Rust 1.0]: https://blog.rust-lang.org/2015/05/15/Rust-1.0.html
diff --git a/crusader.sh b/crusader.sh
deleted file mode 100755
index 8becfed..0000000
--- a/crusader.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-
-git clone https://github.com/brson/cargo-crusader
-cd cargo-crusader
-cargo build --release
-export PATH=$PATH:`pwd`/target/release/
-cd ../
-
-cargo crusader
-
-exit