diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 33bf7209..3c32a928 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,7 +34,7 @@ jobs:
       matrix:
         shard: [1, 2, 3, 4]
         NXF_VER:
-          - "23.04.0"
+          - "23.09.0"
         profile: ["docker"]
     env:
       SHARDS: "4"
diff --git a/README.md b/README.md
index 48134acf..c6d43282 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 [![GitHub Actions Linting Status](https://github.com/nf-core/smrnaseq/actions/workflows/linting.yml/badge.svg)](https://github.com/nf-core/smrnaseq/actions/workflows/linting.yml)[![AWS CI](https://img.shields.io/badge/CI%20tests-full%20size-FF9900?labelColor=000000&logo=Amazon%20AWS)](https://nf-co.re/smrnaseq/results)[![Cite with Zenodo](http://img.shields.io/badge/DOI-10.5281/zenodo.10696391?labelColor=000000)](https://doi.org/10.5281/zenodo.10696391)
 [![nf-test](https://img.shields.io/badge/unit_tests-nf--test-337ab7.svg)](https://www.nf-test.com)
 
-[![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A523.04.0-23aa62.svg)](https://www.nextflow.io/)
+[![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A523.09.0-23aa62.svg)](https://www.nextflow.io/)
 [![run with conda](http://img.shields.io/badge/run%20with-conda-3EB049?labelColor=000000&logo=anaconda)](https://docs.conda.io/en/latest/)
 [![run with docker](https://img.shields.io/badge/run%20with-docker-0db7ed?labelColor=000000&logo=docker)](https://www.docker.com/)
 [![run with singularity](https://img.shields.io/badge/run%20with-singularity-1d355c.svg?labelColor=000000)](https://sylabs.io/docs/)