diff --git a/docs/spec/spec.md b/docs/spec/spec.md
index 6139f9b..ed8592e 100644
--- a/docs/spec/spec.md
+++ b/docs/spec/spec.md
@@ -87,3 +87,8 @@ public function main () returns error? {
     _ = check soapClient->sendOnly(body);
 }
 ```
+
+## 3. Supported SOAP Versions
+
+The soap module supports SOAP 1.1 and 1.2 versions. By default, the soap client is configured to work with SOAP 1.1. Users can overwrite this to support SOAP 1.2 by passing `soapVersion`
+parameter during client initilization.