diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 1f226d8b..a07d4c3a 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -19,7 +19,6 @@ jobs:
       matrix:
         version:
           - '1.10'
-          - 'nightly'
         os:
           - ubuntu-latest
         arch:
@@ -36,6 +35,10 @@ jobs:
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
         continue-on-error: ${{ matrix.version == 'nightly' }}
+      - uses: julia-actions/julia-processcoverage@v1
+      - uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
   docs:
     name: Documentation
     runs-on: ubuntu-latest
diff --git a/README.md b/README.md
index 5f1c66c5..91a05a38 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://sebapersson.github.io/SBMLImporter.jl/dev/)
 [![Build Status](https://github.com/sebapersson/SBMLImporter.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/sebapersson/SBMLImporter.jl/actions/workflows/CI.yml?query=branch%3Amain)
 [![Aqua QA](https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg)](https://github.com/JuliaTesting/Aqua.jl)
+[![codecov](https://codecov.io/gh/sebapersson/SBMLImporter.jl/graph/badge.svg?token=1J7RKUPZOM)](https://codecov.io/gh/sebapersson/SBMLImporter.jl)
 
 SBMLImporter.jl is an importer for dynamic models defined in the [Systems Biology Markup Language (SBML)](https://sbml.org/). It supports most SBML features, such as events, dynamic compartment sizes, and rate, assignment, and algebraic rules. It imports models as a [Catalyst](https://github.com/SciML/Catalyst.jl) `ReactionSystem`, which can be converted into a `JumpProblem` for Gillespie simulations, a `SDEProblem` for Langevin SDE simulations, or an `ODEProblem` for deterministic simulations. For a detailed list of supported features, see below.