Use a tagged version of twig
diff --git a/rebar.config b/rebar.config
index d65fc31..4af6b85 100644
--- a/rebar.config
+++ b/rebar.config
@@ -13,5 +13,5 @@
 % the License.
 
 {deps, [
-    {twig, ".*", {git, "https://github.com/cloudant/twig.git", master}}
+    {twig, ".*", {git, "https://github.com/cloudant/twig.git", {tag, "0.2.1"}}}
 ]}.