diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 54cdd84..c136436 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,29 +8,34 @@ on:
 
 jobs:
   build:
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        platform: [ubuntu-latest]
-        toolchain: [stable]
-        include:
+        rust:
+          - toolchain: stable
           - toolchain: 1.63.0
-            msrv: true
-    runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v3
-      - name: Update Toolchain
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@v1
+        with:
+            toolchain: ${{ matrix.rust.toolchain }}
+            components: clippy, rustfmt
+      - name: Pin dependencies for MSRV
+        if: matrix.rust.toolchain == '1.63.0'
         run: |
-          rustup default ${{ matrix.toolchain }}
-          rustup component add --toolchain ${{ matrix.toolchain }} rustfmt
-          rustup component add --toolchain ${{ matrix.toolchain }} clippy
-          rustup update ${{ matrix.toolchain }}
+          cargo update -p zstd-sys --precise "2.0.8+zstd.1.5.5"
+          cargo update -p time --precise "0.3.20"
+          cargo update -p home --precise "0.5.5"
+          cargo update -p tokio --precise "1.37.0"
       - name: Lint all targets
-        run: cargo clippy
+        run: cargo clippy --all-targets
       - name: Format
         run: cargo fmt -- --check
-      - name: Build with defeault features
+      - name: Build with default features
         run: cargo build --verbose
-      - name: Check release build on Rust ${{ matrix.toolchain }}
+      - name: Check release build on Rust ${{ matrix.rust.toolchain }}
         run: cargo check --release --verbose --color always
       - name: Test
-        run: cargo test --verbose
\ No newline at end of file
+        run: cargo test --verbose
diff --git a/Cargo.toml b/Cargo.toml
index b7b53a6..344dea0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "bdk_kyoto"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.63.0"
 
 [dependencies]
 bdk_chain = { version = "0.18.0" }
diff --git a/tests/client.rs b/tests/client.rs
index c060ba7..0362e01 100644
--- a/tests/client.rs
+++ b/tests/client.rs
@@ -96,7 +96,7 @@ async fn update_returns_blockchain_data() -> anyhow::Result<()> {
     } = res;
     // graph tx and anchor
     let tx = tx_update.txs.first().unwrap();
-    let (anchor, anchor_txid) = *tx_update.anchors.first().unwrap();
+    let (anchor, anchor_txid) = *tx_update.anchors.iter().next().unwrap();
     assert_eq!(anchor_txid, txid);
     assert_eq!(anchor.block_id.height, 102);
     assert_eq!(anchor.block_id.hash, hashes[0]);
@@ -147,7 +147,7 @@ async fn update_handles_reorg() -> anyhow::Result<()> {
     // get update
     let logger = PrintLogger::new();
     let res = client.update(&logger).await.expect("should have update");
-    let (anchor, anchor_txid) = *res.tx_update.anchors.first().unwrap();
+    let (anchor, anchor_txid) = *res.tx_update.anchors.iter().next().unwrap();
     assert_eq!(anchor.block_id.hash, blockhash);
     assert_eq!(anchor_txid, txid);
 
@@ -159,7 +159,7 @@ async fn update_handles_reorg() -> anyhow::Result<()> {
 
     // expect tx to confirm at same height but different blockhash
     let res = client.update(&logger).await.expect("should have update");
-    let (anchor, anchor_txid) = *res.tx_update.anchors.first().unwrap();
+    let (anchor, anchor_txid) = *res.tx_update.anchors.iter().next().unwrap();
     assert_eq!(anchor_txid, txid);
     assert_eq!(anchor.block_id.height, 102);
     assert_ne!(anchor.block_id.hash, blockhash);