diff --git a/beebop/utils.py b/beebop/utils.py
index 59650f07..18628067 100644
--- a/beebop/utils.py
+++ b/beebop/utils.py
@@ -183,12 +183,12 @@ def update_external_clusters_csv(
     [Update the external clusters CSV file with the clusters of the samples
     that were not found in the external clusters file.]
 
-    :param previous_query_clustering_file:Path to CSV file
+    :param previous_query_clustering_file: [Path to CSV file
     containing sample data]
-    :param not_found_q_names:[List of sample names
+    :param not_found_q_names: [List of sample names
     that were not
     found in the external clusters file]
-    :param external_clusters_not_found:[Dictionary mapping
+    :param external_clusters_not_found: [Dictionary mapping
     sample names to external cluster names]
     """
     df, samples_mask = get_df_sample_mask(