diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4f93e5..2b2fb17 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Prioritization of neoantigens is now done separately for each variant type (speeds up the process)
 - NMD information (e.g., escape rule,...) is now also calculated for all variants
 
+## [0.2.10] - 2024-07-08 
+
+### Fix 
+
+- Allow to combine multiple VCF files in indel detection using mutect2 (e.g., when multiple samples are provided)
+
 ## [0.2.9] - 2024-07-04
 
 ### Fix 
diff --git a/workflow/rules/indel.smk b/workflow/rules/indel.smk
index d252702..55337d6 100644
--- a/workflow/rules/indel.smk
+++ b/workflow/rules/indel.smk
@@ -347,7 +347,7 @@ rule combine_aug_short_indels_m2:
     "../envs/bcftools.yml"
   shell:
     """
-      bcftools concat --naive -O z {input} -o - | bcftools sort -O z -o {output} > {log} 2>&1
+      bcftools concat --naive-force -O z {input} -o - | bcftools sort -O z -o {output} > {log} 2>&1
     """
             
 rule select_SNVs_m2: