diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6ddf6a7..6d30a45 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -25,3 +25,9 @@ jobs:
             bash ./run-sonar.sh check
             bash ./run-sonar.sh install
             bash ./run-sonar.sh run
+workflows:
+  version: 2
+  main:
+    jobs:
+      - build:
+          context: DockerHub
diff --git a/src/formatter.py b/src/formatter.py
index 1b1ebcc..ea260aa 100644
--- a/src/formatter.py
+++ b/src/formatter.py
@@ -75,7 +75,7 @@ def format_time(record):
     https://en.wikipedia.org/wiki/ISO_8601
     """
     utc_time = time.gmtime(record.created)
-    time_string = time.strftime('%Y-%m-%d %H:%M:%S', utc_time)
+    time_string = time.strftime('%Y-%m-%dT%H:%M:%S', utc_time)
     return '%s.%03dZ' % (time_string, record.msecs)