diff --git a/setup.py b/setup.py
index 5ce7faaf9274854c13b1e1bb66e28a749b0409a6..da1a22a20a13495097db691606bb744d44b742c3 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ metainfo = {
     'license': 'GPLv3',
     'description': 'In silico protein digestion',
     'platforms': ['Linux', 'Unix', 'MacOsX', 'Windows'],
-    "keywords": ["protein", "enzyme", "protease", "digestion"],
+    "keywords": ["protein", "peptide", "enzyme", "protease", "digestion"],
     'classifiers': [
         'Development Status :: 3 - Alpha',
         'Intended Audience :: Science/Research',