diff --git a/pyproject.toml b/pyproject.toml
index 3cb853e0..dc2e0dce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ cov = [
     "cov-report",
 ]
 e2e = [
-    "git submodule add --force https://github.com/open-feature/spec.git spec",
+    "git submodule update --init --recursive",
     "cp spec/specification/assets/gherkin/* tests/features/",
     "behave tests/features/",
     "rm tests/features/*.feature",
diff --git a/spec b/spec
new file mode 160000
index 00000000..be56f22a
--- /dev/null
+++ b/spec
@@ -0,0 +1 @@
+Subproject commit be56f22af99191eb36039db7b2fa18f46434a383