diff --git a/rules/gatk/Snakefile b/rules/gatk/Snakefile
index e2c329c2..49e00a20 100644
--- a/rules/gatk/Snakefile
+++ b/rules/gatk/Snakefile
@@ -32,6 +32,7 @@ rule gatk_RealignerTargetCreator:
         "{params.knowns_settings}"
         " --out {output}"
         " 2>> {log}"
+        " && chmod -v g+w {output} 2>> {log}"
 
         #       gatk_2015.sh GenomeAnalysisTK.jar -T RealignerTargetCreator -nt $(NUM_THREADS) -L $(EXOME_TRACK) -I $< -R $(REF)       -known $(GATKRES_PATH_2k15)/Mills_and_1000G_gold_standard.indels.b37.vcf -known $(GATKRES_PATH_2k15)/1000G_phase1.indels.b37.vcf --out $@.tmp  $(OUTPUT_TO_LOG) \
 	    #MOUSE: gatk_2015.sh GenomeAnalysisTK.jar -T RealignerTargetCreator -nt $(NUM_THREADS) -L $(EXOME_TRACK) -I $< -R $(MOUSE_REF) -known /data/biotools/reference/mgp_indels/C57BL6NJ_CBAJDBA2.indels.vcf.gz                                                       --out $@.tmp  $(OUTPUT_TO_LOG) \