diff --git a/.gitmodules b/.gitmodules
index 106b0d69f0..fdaac1da3e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,6 +4,7 @@
 [submodule "providers/flagd/test-harness"]
 	path = providers/flagd/test-harness
 	url = https://github.com/open-feature/test-harness.git
+	branch = v3.10.1
 [submodule "providers/flagd/spec"]
 	path = providers/flagd/spec
 	url = https://github.com/open-feature/spec.git
@@ -16,3 +17,4 @@
 [submodule "tools/flagd-api-testkit/test-harness"]
 	path = tools/flagd-api-testkit/test-harness
 	url = https://github.com/open-feature/test-harness.git
+	branch = v3.8.0