diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1e6450ec..888e8852 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Added support for pre-built indexes in `genomes.config` file for `cellranger`, `cellranger-arc`, `simpleaf` and `simpleaf txp2gene` ([#371](https://github.com/nf-core/scrnaseq/issues/371))
+
 ## v2.7.1 - 2024-08-13
 
 - Fix that tests have not been executed with nf-test v0.9 ([#359](https://github.com/nf-core/scrnaseq/pull/359))
diff --git a/workflows/scrnaseq.nf b/workflows/scrnaseq.nf
index 120a19d5..ae2249c7 100644
--- a/workflows/scrnaseq.nf
+++ b/workflows/scrnaseq.nf
@@ -37,9 +37,20 @@ workflow SCRNASEQ {
         error "Only cellranger supports `protocol = 'auto'`. Please specify the protocol manually!"
     }
 
-    params.fasta = getGenomeAttribute('fasta')
-    params.gtf = getGenomeAttribute('gtf')
-    params.star_index = getGenomeAttribute('star')
+    // collect paths from genome attributes file (e.g. iGenomes.config; optional)
+    params.fasta            = getGenomeAttribute('fasta')
+    params.gtf              = getGenomeAttribute('gtf')
+    params.star_index       = getGenomeAttribute('star')
+    params.salmon_index     = getGenomeAttribute('simpleaf')
+    params.txp2gene         = getGenomeAttribute('simpleaf_tx2pgene')
+
+    // Make cellranger or cellranger-arc index conditional
+    if (params.aligner in ["cellranger", "cellrangermulti"]){
+        params.cellranger_index = getGenomeAttribute('cellranger')
+    }
+    else if (params.aligner == "cellrangerarc") {
+        params.cellranger_index = getGenomeAttribute('cellrangerarc')
+    }
 
     ch_genome_fasta = params.fasta ? file(params.fasta, checkIfExists: true) : []
     ch_gtf = params.gtf ? file(params.gtf, checkIfExists: true) : []