diff --git a/.github/workflows/sdk-spec.yml b/.github/workflows/sdk-spec.yml
index 7ad90ac..4afd38a 100644
--- a/.github/workflows/sdk-spec.yml
+++ b/.github/workflows/sdk-spec.yml
@@ -11,7 +11,7 @@ permissions:
 jobs:
   sdk-spec:
     # Keep the ref in `uses:` and `spec-ref` in sync.
-    uses: Flagsmith/sdk-spec/.github/workflows/run-spec.yml@v0.3.0
+    uses: Flagsmith/sdk-spec/.github/workflows/run-spec.yml@v0.5.1
     with:
-      spec-ref: v0.3.0
+      spec-ref: v0.5.1
       language: java