diff --git a/setup.cfg b/setup.cfg
index 60fd44e..e8eda2f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = ProcruSQL
-version = 0.0.2
+version = 0.0.3
 author = Peter J. Holzer
 author_email = hjp@hjp.at
 description = Make a database fit its description
diff --git a/src/procrusql/__init__.py b/src/procrusql/__init__.py
index 0d5c736..52c6625 100644
--- a/src/procrusql/__init__.py
+++ b/src/procrusql/__init__.py
@@ -1,3 +1,4 @@
+import argparse
 import logging
 import sys
 
@@ -247,16 +248,26 @@ def dump_dot():
 
 def main():
     logging.basicConfig(format="%(asctime)s %(levelname)s %(name)s %(lineno)d | %(message)s", level=logging.DEBUG)
-    with open(sys.argv[1]) as rf:
-        text = rf.read()
-    ps = parser.ParseState(text)
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--dbname")
+    ap.add_argument("--dbuser")
+    ap.add_argument("files", nargs="+")
+    args = ap.parse_args()
 
-    ps2 = parser.parse_ruleset(ps)
+    db = psycopg2.connect(dbname=args.dbname, user=args.dbuser)
 
-    if not ps2:
-        ps.printerror()
-        sys.exit(1)
+    rules = []
+    for f in args.files:
+        with open(f) as rf:
+            text = rf.read()
+        ps = parser.ParseState(text)
 
-    db = psycopg2.connect(sys.argv[2])
-    fit(db, ps2.ast)
+        ps2 = parser.parse_ruleset(ps)
+
+        if not ps2:
+            ps.printerror()
+            sys.exit(1)
+        rules.extend(ps2.ast)
+
+    fit(db, rules)