diff --git a/Snakefile b/Snakefile
index 6375cfa..e82ec41 100644
--- a/Snakefile
+++ b/Snakefile
@@ -290,7 +290,7 @@ rule picard_markdup:
     conda:
         "env_config/picard.yaml",
 
-    resources: cpus="2", maxtime="30:00", mem_mb="20gb",
+    resources: cpus="2", maxtime="4:00:00", mem_mb="20gb",
 
     shell: """
             {params.picard} -Xmx2G -Xms2G  \