diff --git a/spp_audit_log/models/spp_audit_log.py b/spp_audit_log/models/spp_audit_log.py
index 2c168bb..252fc6c 100644
--- a/spp_audit_log/models/spp_audit_log.py
+++ b/spp_audit_log/models/spp_audit_log.py
@@ -119,7 +119,7 @@ def _compute_data_html(self):
         for rec in self:
             thead = ""
             for head in (_("Field"), _("Old value"), _("New value")):
-                thead += "<th>%s</th>" % head
+                thead += '<th style="width: 33%;">{head}</th>'.format(head=head)
             thead = "<thead><tr>%s</tr></thead>" % thead
             tbody = ""
             for line in rec._get_content():