diff --git a/MANIFEST.in b/MANIFEST.in
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,5 +3,6 @@
 include README.db_testing
 include README.dev
 include requirements.txt
+include requirements-swh.txt
 include version.txt
 recursive-include sql *
diff --git a/requirements-swh.txt b/requirements-swh.txt
new file mode 100644
--- /dev/null
+++ b/requirements-swh.txt
@@ -0,0 +1,3 @@
+swh.core >= 0.0.28
+swh.objstorage >= 0.0.17
+swh.scheduler
diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,13 +1,9 @@
-dateutil
+python-dateutil
 psycopg2
 vcversioner
 
 # remote storage API server
 flask
 
-# Internal dependencies
-swh.core >= 0.0.28
-swh.objstorage >= 0.0.17
 
 click
-swh.scheduler
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -5,13 +5,13 @@
 
 def parse_requirements():
     requirements = []
-    with open('requirements.txt') as f:
-        for line in f.readlines():
-            line = line.strip()
-            if not line or line.startswith('#'):
-                continue
-            requirements.append(line)
-
+    for reqf in ('requirements.txt', 'requirements-swh.txt'):
+        with open(reqf) as f:
+            for line in f.readlines():
+                line = line.strip()
+                if not line or line.startswith('#'):
+                    continue
+                requirements.append(line)
     return requirements
 
 
diff --git a/swh/storage/tests/test_storage.py b/swh/storage/tests/test_storage.py
--- a/swh/storage/tests/test_storage.py
+++ b/swh/storage/tests/test_storage.py
@@ -1199,7 +1199,8 @@
             'visit': origin_visit2['visit'],
             'target': self.revision3['id'],
         })
-        # 2 occurrences on same revision with lower validity date with 1 day delta
+        # 2 occurrences on same revision with lower validity date with 1 day
+        # delta
         self.storage.occurrence_add([occurrence2])
         self.storage.occurrence_add([occurrence3])