diff --git a/bin/create_library/main.py b/bin/create_library/main.py
index a6fb7ae..20967f1 100755
--- a/bin/create_library/main.py
+++ b/bin/create_library/main.py
@@ -26,7 +26,7 @@ def create_library(compound_df, feature_df,
     # Merge the compound and feature tables
     df = merge_compound_feature_tables(compound_df, feature_df)
 
-    if not df:
+    if df is None or df.empty:
         return None, None
 
     if filter_library:
diff --git a/workflowinput.yaml b/workflowinput.yaml
index 140c942..0db7ef4 100644
--- a/workflowinput.yaml
+++ b/workflowinput.yaml
@@ -1,7 +1,7 @@
 workflowname: reverse_metabolomics_create_library_workflow
 workflowdescription: This is to create MS/MS libraries using reverse metabolomics.
 workflowlongdescription: This is the workflow to create a tsv library from a set of mzML files and compound csv files. The tsv file is ready to be uploaded to GNPS library.
-workflowversion: "2024.09.04"
+workflowversion: "2024.09.05"
 workflowfile: nf_workflow.nf
 workflowautohide: false
 adminonly: false