diff --git a/garak/generators/watsonx.py b/garak/generators/watsonx.py
index 5c1b3b8b..f9644931 100644
--- a/garak/generators/watsonx.py
+++ b/garak/generators/watsonx.py
@@ -53,7 +53,7 @@ def _set_bearer_token(self, iam_url="https://iam.cloud.ibm.com/identity/token"):
     def _generate_with_project(self, payload):
         # Generation via Project ID.
         
-        url = self.uri + "/ml/v1/text/generation?version=2023-05-29"
+        url = self.uri + f"/ml/v1/text/generation?version={self.version}"
 
         body = {
             "input": payload,