diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index 87e81353649..337b4ab40b1 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -126,6 +126,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.53.0", ReleaseInfo()),
             ("v1.54.0", ReleaseInfo()),
             ("v1.55.0", ReleaseInfo()),
+            ("v1.56.0", ReleaseInfo()),
         ]
     ),
     "go": OrderedDict(
@@ -723,6 +724,12 @@ LANG_RELEASE_MATRIX = {
                     runtimes=["python"], testcases_file="python__master"
                 ),
             ),
+            (
+                "v1.56.0",
+                ReleaseInfo(
+                    runtimes=["python"], testcases_file="python__master"
+                ),
+            ),
         ]
     ),
     "node": OrderedDict(
@@ -813,6 +820,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.53.0", ReleaseInfo()),
             ("v1.54.0", ReleaseInfo()),
             ("v1.55.0", ReleaseInfo()),
+            ("v1.56.0", ReleaseInfo()),
         ]
     ),
     "php": OrderedDict(
@@ -867,6 +875,7 @@ LANG_RELEASE_MATRIX = {
             ("v1.53.0", ReleaseInfo()),
             ("v1.54.0", ReleaseInfo()),
             ("v1.55.0", ReleaseInfo()),
+            ("v1.56.0", ReleaseInfo()),
         ]
     ),
     "csharp": OrderedDict(