diff --git a/plugins/microsoft_iis.yaml b/plugins/microsoft_iis.yaml
index 6cf8bb88..ee59c1b8 100644
--- a/plugins/microsoft_iis.yaml
+++ b/plugins/microsoft_iis.yaml
@@ -28,7 +28,7 @@ pipeline:
     include:
       - {{ $file_path }}
     multiline:
-      line_start_pattern: \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2} [\d+.]+
+      line_start_pattern: '\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2} '
     start_at: {{ $start_at }}
     labels:
       log_type: microsoft_iis
@@ -37,7 +37,7 @@ pipeline:
 
   - id: microsoft_iis_parser
     type: regex_parser
-    regex: '^(?P<timestamp>\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}) (?P<server_ip>[\d+.]+) (?P<request_method>[A-Z]+) (?P<uri_stem>[^ ]+) (?P<uri_query>[^ ]+) (?P<server_port>\d+) (?P<username>[^ ]+) (?P<client_ip>[\d+.]+) (?P<user_agent>[^ ]+) (?P<referer>[^ ]+) (?P<http_status>\d+) (?P<http_sub_status>\d+) (?P<win32_status>\d+) (?P<time_taken>\d+)'
+    regex: '^(?P<timestamp>\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}) (?P<server_ip>[\d\w\.:]+) (?P<request_method>[A-Z]+) (?P<uri_stem>[^ ]+) (?P<uri_query>[^ ]+) (?P<server_port>\d+) (?P<username>[^ ]+) (?P<client_ip>[\d\w\.:]+) (?P<user_agent>[^ ]+) (?P<referer>[^ ]+) (?P<http_status>\d+) (?P<http_sub_status>\d+) (?P<win32_status>\d+) (?P<time_taken>\d+)'
     timestamp:
       parse_from: timestamp
       layout: '%Y-%m-%d %H:%M:%S'