diff --git a/example-app/utils/tests/test_time.py b/example-app/utils/tests/test_time.py
index 2773fc9..34b7426 100644
--- a/example-app/utils/tests/test_time.py
+++ b/example-app/utils/tests/test_time.py
@@ -4,4 +4,4 @@
 
 def test_time():
     current_time = datetime.now()
-    assert(format_time(current_time) == datetime.strftime(current_time, '%Y-%m-%d %H:%M:%S'))
+    assert(format_time(current_time) == datetime.strftime(current_time, '%Y-%m-%d:%H:%M:%S'))
diff --git a/example-app/utils/time.py b/example-app/utils/time.py
index a0913a7..a635133 100644
--- a/example-app/utils/time.py
+++ b/example-app/utils/time.py
@@ -1,4 +1,4 @@
 from datetime import datetime
 
 def format_time(time):
-    return datetime.strftime(time, '%Y-%m-%d %H:%M:%S')
+    return datetime.strftime(time, '%Y-%m-%d:%H:%M:%S')