diff --git a/.gitmodules b/.gitmodules
index 91761e36..a7cdda54 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -5,7 +5,7 @@
 [submodule "providers/openfeature-provider-flagd/test-harness"]
 	path = providers/openfeature-provider-flagd/openfeature/test-harness
 	url = git@github.com:open-feature/flagd-testbed.git
-	branch = v0.5.21
+	branch = v2.1.0
 [submodule "providers/openfeature-provider-flagd/spec"]
 	path = providers/openfeature-provider-flagd/openfeature/spec
 	url = https://github.com/open-feature/spec
diff --git a/providers/openfeature-provider-flagd/openfeature/test-harness b/providers/openfeature-provider-flagd/openfeature/test-harness
index 3f51fad5..ec1d75c3 160000
--- a/providers/openfeature-provider-flagd/openfeature/test-harness
+++ b/providers/openfeature-provider-flagd/openfeature/test-harness
@@ -1 +1 @@
-Subproject commit 3f51fad5816ecc259092c49d4623c7c4f617d635
+Subproject commit ec1d75c3b93c1cc54828e517ad744a5150d0598a