diff --git a/tools/interop_matrix/client_matrix.py b/tools/interop_matrix/client_matrix.py
index ff4550f8484..9a74c0ad382 100644
--- a/tools/interop_matrix/client_matrix.py
+++ b/tools/interop_matrix/client_matrix.py
@@ -113,6 +113,7 @@ LANG_RELEASE_MATRIX = {
             ('v1.35.0', ReleaseInfo()),
             ('v1.36.3', ReleaseInfo()),
             ('v1.37.0', ReleaseInfo()),
+            ('v1.38.0', ReleaseInfo()),
         ]),
     'go':
         OrderedDict([
@@ -323,6 +324,7 @@ LANG_RELEASE_MATRIX = {
             ('v1.35.0', ReleaseInfo(runtimes=['python'])),
             ('v1.36.3', ReleaseInfo(runtimes=['python'])),
             ('v1.37.0', ReleaseInfo(runtimes=['python'])),
+            ('v1.38.0', ReleaseInfo(runtimes=['python'])),
         ]),
     'node':
         OrderedDict([
@@ -389,6 +391,7 @@ LANG_RELEASE_MATRIX = {
             ('v1.35.0', ReleaseInfo()),
             ('v1.36.3', ReleaseInfo()),
             ('v1.37.0', ReleaseInfo()),
+            ('v1.38.0', ReleaseInfo()),
         ]),
     'php':
         OrderedDict([
@@ -428,6 +431,7 @@ LANG_RELEASE_MATRIX = {
             ('v1.35.0', ReleaseInfo()),
             ('v1.36.3', ReleaseInfo()),
             ('v1.37.0', ReleaseInfo()),
+            ('v1.38.0', ReleaseInfo()),
         ]),
     'csharp':
         OrderedDict([