diff --git a/projects/gandi/BUILD b/projects/gandi/BUILD
index 62beb01..936b3c7 100644
--- a/projects/gandi/BUILD
+++ b/projects/gandi/BUILD
@@ -4,7 +4,7 @@ py_library(
     name = "gandi",
     srcs = glob(["src/python/gandi/client.py"]),
     imports = [
-        "src/python"
+        "src/python",
     ],
     deps = [
         py_requirement("requests"),
diff --git a/projects/public-dns/BUILD b/projects/public-dns/BUILD
index ac7e79e..06bf1bf 100644
--- a/projects/public-dns/BUILD
+++ b/projects/public-dns/BUILD
@@ -1,6 +1,9 @@
-py_binary(
+zapp_binary(
     name = "updater",
     main = "src/python/arrdem/updater/__main__.py",
+    imports = [
+        "src/python",
+    ],
     deps = [
         "//projects/gandi",
         py_requirement("jinja2"),
diff --git a/projects/public-dns/src/python/arrdem/updater/__main__.py b/projects/public-dns/src/python/arrdem/updater/__main__.py
index de5e10b..2d03421 100644
--- a/projects/public-dns/src/python/arrdem/updater/__main__.py
+++ b/projects/public-dns/src/python/arrdem/updater/__main__.py
@@ -9,9 +9,6 @@ import re
 import sys
 
 
-for e in sys.path:
-    print(e)
-
 from gandi.client import GandiAPI
 import jinja2
 import meraki
@@ -30,8 +27,10 @@ RECORD_LINE_PATTERN = re.compile(
 
 def update(m, k, f, *args, **kwargs):
     """clojure.core/update for Python's stateful maps."""
+
     if k in m:
         m[k] = f(m[k], *args, **kwargs)
+
     return m
 
 
@@ -70,8 +69,8 @@ def template_and_parse_zone(template_file, template_bindings):
     assert template_file is not None
     assert template_bindings is not None
 
-    with open(template_file) as f:
-        dat = jinja2.Template(f.read()).render(**template_bindings)
+    with open(template_file) as fp:
+        dat = jinja2.Template(fp.read()).render(**template_bindings)
 
     uncommitted_records = []
     for line in dat.splitlines():
@@ -138,7 +137,9 @@ parser.add_argument("--dry-run", dest="dry", action="store_true", default=False)
 
 def main():
     args = parser.parse_args()
-    config = yaml.safe_load(open(args.config_file, "r"))
+
+    with open(args.config_file, "r") as fp:
+        config = yaml.safe_load(fp)
 
     dashboard = meraki.DashboardAPI(config["meraki"]["key"], output_log=False)
     org = config["meraki"]["organization"]