diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..a65facf
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,25 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.9.0] - 2024-05-24
+
+### Added
+
+- Add the parameter `--fastp_args` to provide any arbitrary parameters to fastp
+
+### Changed
+
+- Fastp version is upgraded from 0.20.1 to o.23.4
+
+
+To be completed...
+
+
+
+
+[unreleased]: https://github.com/olivierlacan/keep-a-changelog/compare/v1.9.0...HEAD
+[1.9.0]: https://github.com/olivierlacan/keep-a-changelog/compare/v1.8.1...v1.9.0
diff --git a/modules/01_fastp.nf b/modules/01_fastp.nf
index a972813..5d57e5d 100644
--- a/modules/01_fastp.nf
+++ b/modules/01_fastp.nf
@@ -6,7 +6,7 @@ process FASTP_PAIRED {
     publishDir "${params.output}", mode: "copy", pattern: "*fastp_stats*"
     publishDir "${params.output}/${name}/", mode: "copy", pattern: "software_versions.*"
 
-    conda (params.enable_conda ? "bioconda::fastp=0.20.1" : null)
+    conda (params.enable_conda ? "bioconda::fastp=0.23.4" : null)
 
     input:
         tuple val(name), file(fastq1), file(fastq2)
@@ -20,7 +20,7 @@ process FASTP_PAIRED {
 
     """
     # --input_files needs to be forced, otherwise it is inherited from profile in tests
-    fastp \
+    fastp ${params.fastp_args} \
     --in1 ${fastq1} \
     --in2 ${fastq2} \
     --out1 ${fastq1.baseName}.trimmed.fq.gz \
@@ -41,7 +41,7 @@ process FASTP_SINGLE {
     publishDir "${params.output}", mode: "copy", pattern: "*fastp_stats*"
     publishDir "${params.output}/${name}/", mode: "copy", pattern: "software_versions.*"
 
-    conda (params.enable_conda ? "bioconda::fastp=0.20.1" : null)
+    conda (params.enable_conda ? "bioconda::fastp=0.23.4" : null)
 
     input:
         tuple val(name), file(fastq1)
@@ -54,7 +54,7 @@ process FASTP_SINGLE {
 
     """
     # --input_files needs to be forced, otherwise it is inherited from profile in tests
-    fastp \
+    fastp ${params.fastp_args} \
     --in1 ${fastq1} \
     --out1 ${fastq1.baseName}.trimmed.fq.gz \
     --json ${name}.fastp_stats.json \
diff --git a/nextflow.config b/nextflow.config
index d909fe8..819a5b8 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -18,6 +18,7 @@ params.inception = false
 params.skip_trimming = false
 params.star_two_pass_mode = false
 params.additional_args = ""
+params.fastp_args = ""
 
 profiles {
   conda {
@@ -88,6 +89,7 @@ Optional input:
     * skip_trimming: skips the read trimming step
     * star_two_pass_mode: activates STAR two-pass mode, increasing sensitivity of novel junction discovery, recommended for RNA variant calling (default: false)
     * additional_args: additional alignment arguments, only effective in BWA mem, BWA mem 2 and STAR (default: none)
+    * fastp_args: additional fastp arguments (default: none)
 
 Output:
     * A BAM file \${name}.bam and its index