diff --git a/fsac/__init__.py b/fsac/__init__.py
index 18df1df..81180e1 100644
--- a/fsac/__init__.py
+++ b/fsac/__init__.py
@@ -1,3 +1,3 @@
-__version__ = '1.0.4'
+__version__ = '1.1.0'
 __author__ = 'Dillon Barker'
 __email__ = 'dillon.barker@canada.ca'
diff --git a/fsac/allele_call.py b/fsac/allele_call.py
index c70ab18..278ac0a 100644
--- a/fsac/allele_call.py
+++ b/fsac/allele_call.py
@@ -1,4 +1,5 @@
 import json
+import logging
 import subprocess
 import io
 import re
@@ -16,6 +17,8 @@ def allele_call(genome: Path, genes: Path, output: Path) -> None:
 
 def blast(query_path: Path, genome_path: Path) -> pd.DataFrame:
 
+    logging.info('BLASTing locus %s in subject %s', query_path, genome_path)
+
     out_format = '6 qseqid sseqid pident length qstart qend sstart send qlen \
                   slen bitscore gaps sseq qseq mismatch'
 
@@ -81,7 +84,6 @@ def filter_result(blast_output: pd.DataFrame) -> Optional[pd.Series]:
 
     # Perfect match
     elif any(blast_output['correct']):
-
         best = blast_output[blast_output['correct']]
 
     # Highest bitscore
@@ -175,3 +177,5 @@ def unpack_value(value):
 
     with json_out.open('w') as j:
         json.dump(results, j, indent=4)
+        logging.info('Wrote results to %s', json_out)
+
diff --git a/fsac/main.py b/fsac/main.py
index 4666a9c..dd444ba 100644
--- a/fsac/main.py
+++ b/fsac/main.py
@@ -1,4 +1,6 @@
 import argparse
+import logging
+import os
 import sys
 from pathlib import Path
 
@@ -7,14 +9,23 @@
 from .update import update_directory
 from .tabulate import tabulate_calls
 
+# Ensure numpy, via pandas, doesn't use more than 1 thread.
+# If numpy uses multiple threads, it brings no performance benefit in this
+# case, but can cause problems if you're running lots of jobs
+# on a single HPC node
+for env_var in ('OPENBLAS_NUM_THREADS',
+                'OMP_NUM_THREADS',
+                'MKL_NUM_THREADS',
+                'NUMEXPR_NUM_THREADS'):
+    os.environ[env_var] = '1'
 
 def arguments():
 
     parser = argparse.ArgumentParser()
 
     parser.add_argument('-v', '--version',
-                        action='store_true',
-                        help='Print version and exit')
+                        action='version',
+                        version=f'{parser.prog} {__version__}')
 
     parser.set_defaults(func=None)
     subparsers = parser.add_subparsers(title='Commands')
@@ -91,10 +102,6 @@ def arguments():
 
     args = parser.parse_args()
 
-    if args.version:
-        print('fsac', __version__)
-        sys.exit(0)
-
     if args.func is None:
         parser.print_help()
         sys.exit(0)
@@ -106,6 +113,12 @@ def main():
 
     args = arguments()
 
+    logging.basicConfig(datefmt='%Y-%m-%d %H:%M',
+                        format='%(asctime)s - %(levelname)s: %(message)s',
+                        stream=sys.stderr,
+                        level=logging.INFO)
+
+    logging.info('Running %s', args.func.__name__)
     args.func(args)
 
 
diff --git a/fsac/update.py b/fsac/update.py
index 286ed74..86d8bd7 100644
--- a/fsac/update.py
+++ b/fsac/update.py
@@ -2,6 +2,7 @@
 from pathlib import Path
 from contextlib import suppress
 import json
+import logging
 
 SeqAllele = Tuple[Optional[str], Optional[str]]
 LocusData = Union[str, int, float, bool]
@@ -67,20 +68,25 @@ def extend_hit(gene, threshold: int, genome_path: Path):
     of the alignment causes the alignment to not be extended.
     """
 
+    logging.info('Extending hit for %s in %s', gene['QueryName'], genome_path)
     seq = gene['SubjAln'].replace('-', '')
 
     difference = gene['QueryLength'] - len(seq)
 
     if difference is 0:
+        logging.info('Difference is 0. Skipping')
         # handle a complete hit
         # return early
         return seq, gene['MarkerMatch']
 
     if difference > threshold:
+        logging.info('Difference (%s) is greater than %s. Skipping',
+                     difference, threshold)
         # handle large discrepancy
         # return early
         return None, None
 
+
     # Open subject FASTA
     sequences_names = get_known_alleles(genome_path)
     names_sequences = {str(value.split()[0]): key
@@ -103,8 +109,16 @@ def extend_hit(gene, threshold: int, genome_path: Path):
 
     else:
 
-        full_sequence = reverse_complement(contig[start : end])
+        try:
+            full_sequence = reverse_complement(contig[start : end])
+
+        except KeyError:
+            msg = 'Cannot assign allele due to ambiguous subject sequence'
+            logging.info(msg)
+            return None, None
 
+    logging.info('Extended hit to length %s, expected %s',
+                 len(full_sequence) - 1, gene['QueryLength'])
     return full_sequence, None
 
 
@@ -115,7 +129,6 @@ def reverse_complement(sequence: str):
             'T': 'A',
             'G': 'C',
             'C': 'G',
-            'N': 'N'
             }
 
     return ''.join(complements[x] for x in reversed(sequence))