diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index b37c6df6a1c..c6b8703b170 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -193,6 +193,7 @@ LANG_RELEASE_MATRIX = {
             ('v1.39.1', ReleaseInfo(runtimes=['go1.16'])),
             ('v1.40.0', ReleaseInfo(runtimes=['go1.16'])),
             ('v1.41.0', ReleaseInfo(runtimes=['go1.16'])),
+            ('v1.42.0', ReleaseInfo(runtimes=['go1.16'])),
         ]),
     'java':
         OrderedDict([