diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 285a484..e9a1e9a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,4 +75,9 @@ jobs:
         run: poetry install --with dev --extras "rxnmapper"
 
       - name: Run pytest
-        run: poetry run pytest --cov=src/sr_smiles --cov-report=term-missing
+        run: poetry run pytest --cov=src/sr_smiles --cov-report=term-missing --cov-report=xml
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/README.md b/README.md
index 141b7b6..d4d965c 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 [![Python versions](https://img.shields.io/badge/python-%3E%3D3.9-blue)](https://pypi.org/project/sr-smiles)
 [![License](https://img.shields.io/github/license/heid-lab/sr-smiles)](https://github.com/heid-lab/sr-smiles/blob/main/LICENSE)
 [![Test](https://github.com/heid-lab/sr-smiles/actions/workflows/ci.yml/badge.svg)](https://github.com/heid-lab/sr-smiles/actions)
-<!-- [![Coverage](https://codecov.io/gh/heid-lab/sr-smiles/branch/main/graph/badge.svg)](https://codecov.io/gh/heid-lab/sr-smiles) -->
+[![Coverage](https://codecov.io/gh/heid-lab/sr-smiles/branch/main/graph/badge.svg)](https://codecov.io/gh/heid-lab/sr-smiles)
 <!-- [![Downloads](https://img.shields.io/github/downloads/heid-lab/sr-smiles/total.svg)](https://github.com/heid-lab/sr-smiles/releases) -->
 
 [Overview](#overview) | [Installation](#installation) | [Usage](#usage) | [Contributing](#contributing) | [Citation](#citation) | [References](#references)