diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index ff62004b730..1a7c24f44be 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -173,7 +173,7 @@ LANG_RELEASE_MATRIX = {
             'v1.12.0': None
         },
         {
-            'v1.13.0': None
+            'v1.13.1': None
         },
     ],
     'python': [