diff --git a/lib/savon/soap.rb b/lib/savon/soap.rb
index 035d169f..b1cbdb81 100644
--- a/lib/savon/soap.rb
+++ b/lib/savon/soap.rb
@@ -128,7 +128,7 @@ class SOAP
     ContentType = { 1 => "text/xml", 2 => "application/soap+xml" }
 
     # SOAP xs:dateTime format.
-    DateTimeFormat = "%Y-%m-%dT%H:%M:%SZ"
+    DateTimeFormat = "%Y-%m-%dT%H:%M:%S%Z"
 
     # SOAP xs:dateTime Regexp.
     DateTimeRegexp = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}/