diff --git a/.github/codecov.yml b/.github/codecov.yml
new file mode 100644
index 00000000..46b3feb1
--- /dev/null
+++ b/.github/codecov.yml
@@ -0,0 +1,15 @@
+# ref: https://docs.codecov.com/docs/codecovyml-reference
+coverage:
+  range: 80..100
+  round: down
+  precision: 1
+  status:
+    # ref: https://docs.codecov.com/docs/commit-status
+    project:
+      default:
+        # Avoid false negatives
+        threshold: 1%
+
+ignore:
+  - "ffi"
+  - "benches"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1a4164ef..a3175649 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -52,6 +52,26 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           args: --all-features
 
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: llvm-tools-preview
+      - name: cargo install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
+      - name: cargo generate-lockfile
+        if: hashFiles('Cargo.lock') == ''
+        run: cargo generate-lockfile
+      - name: cargo llvm-cov
+        run: cargo llvm-cov --locked --all-features --lcov --output-path lcov.info
+      - name: Upload to codecov.io
+        uses: codecov/codecov-action@v3
+        with:
+          fail_ci_if_error: true
+
   build:
     name: Build library
     runs-on: ${{ matrix.os }}