diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8e1f5ad..fa101df 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1 +1,3 @@
+bpython
 pytest==4.3.1
+yapf
diff --git a/tools/scrapd-merger.py b/tools/scrapd-merger.py
index 222a82e..03e0838 100644
--- a/tools/scrapd-merger.py
+++ b/tools/scrapd-merger.py
@@ -12,8 +12,9 @@ $ cat new.json | python scrapd-merger.py old.json -
 """

 import argparse
-import logging
 import json
+import logging
+from pathlib import Path
 import pprint
 import sys

@@ -27,14 +28,19 @@ def main():
     # Merge the data.
     results = merge(json.loads(args.old.read()), json.loads(args.infile.read()))

+    # Write the data.
+    s_results = json.dumps(results, sort_keys=True, indent=2)
+    args.old.seek(0)
+    args.old.write(s_results)
+
     # Display the results.
-    print(json.dumps(results, sort_keys=True, indent=2), file=sys.stdout)
+    print(s_results)


-def get_cli_parser(): # pragma: no cover
+def get_cli_parser():  # pragma: no cover
     """Get the CLI parser."""
     parser = argparse.ArgumentParser(description='Create beautiful releases on GitHub.')
-    parser.add_argument('old', type=argparse.FileType('rt'))
+    parser.add_argument('old', type=argparse.FileType('r+t'))
     parser.add_argument('infile', type=argparse.FileType('rt'), default=sys.stdin)

     return parser
@@ -186,4 +192,3 @@ FINAL = """
     }
 ]
 """
-