diff --git a/libpassiveagent/check.py b/libpassiveagent/check.py
index b883a43..fdb8d33 100644
--- a/libpassiveagent/check.py
+++ b/libpassiveagent/check.py
@@ -26,7 +26,13 @@ def run_check(c, pc, reschedule_and_post=True):
   if reschedule_and_post:
     schedule.reschedule(c, pc)
   logging.info('run_check(): %s', c['passive checks'][pc]['command'].split())
-  res = subprocess.run(c['passive checks'][pc]['command'].split(), capture_output=True, text=True)
+  if sys.version_info[:3] > (3,7):
+     res = subprocess.run(c['passive checks'][pc]['command'].split(), capture_output=True, text=True)
+  else:
+     from subprocess import PIPE
+     res = subprocess.run(c['passive checks'][pc]['command'].split(), stdout=PIPE, stderr=PIPE)
+     stdout_str = res.stdout
+     res.stdout = stdout_str.decode("utf-8")
   logging.info('run_check(): returncode: %s; stdout: %s', res.returncode, res.stdout.rstrip())
   if reschedule_and_post:
     post_results(c, pc, { "code": res.returncode, "stdout": res.stdout.rstrip() })
@@ -57,6 +63,8 @@ def post_results(c, pc, res):
       r = requests.post(u, data=postdata, timeout=10)
     except requests.Timeout:
       logging.warning('Timeout posting results to %s', u)
+    except requests.exceptions.ConnectionError:
+      logging.warning('Connection Error posting results to %s', u)
     else:
       if r.status_code == requests.codes.ok:
         logging.info('Submitted successfully to NRDP: %s', u)