diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index 96e2b33c614..52cf0230763 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -155,6 +155,7 @@ LANG_RELEASE_MATRIX = {
             ('v1.26.0', ReleaseInfo(runtimes=['go1.11'])),
             ('v1.27.1', ReleaseInfo(runtimes=['go1.11'])),
             ('v1.28.0', ReleaseInfo(runtimes=['go1.11'])),
+            ('v1.29.0', ReleaseInfo(runtimes=['go1.11'])),
         ]),
     'java':
         OrderedDict([