diff --git a/.gitmodules b/.gitmodules
index 72b2fc1fd..c2774bbc1 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,7 +4,7 @@
 [submodule "providers/flagd/test-harness"]
 	path = providers/flagd/test-harness
 	url = https://github.com/open-feature/test-harness.git
-	branch = v1.3.3
+	branch = v2.1.0
 [submodule "providers/flagd/spec"]
 	path = providers/flagd/spec
 	url = https://github.com/open-feature/spec.git
diff --git a/providers/flagd/test-harness b/providers/flagd/test-harness
index 1252f5145..ec1d75c3b 160000
--- a/providers/flagd/test-harness
+++ b/providers/flagd/test-harness
@@ -1 +1 @@
-Subproject commit 1252f5145324cfd700c4e5dc35130551904a8f05
+Subproject commit ec1d75c3b93c1cc54828e517ad744a5150d0598a