diff --git a/workflow/main.nf b/workflow/main.nf
index 0b4352c39b42f8781ea30bb7859d638ec18ba909..ab19e278d5edd1c310b5cf097b8bc6cc273f2a02 100644
--- a/workflow/main.nf
+++ b/workflow/main.nf
@@ -264,7 +264,7 @@ process experimentQC {
     file dedupDesign
 
   output:
-    file '*.{png,npz}' into deepToolsStats
+    file '*.{pdf,npz}' into deepToolsStats
     file('version_*.txt') into experimentQCVersions
 
   script: