diff --git a/.versioneer-lookup b/.versioneer-lookup
index 86ee131b..d753c1c0 100644
--- a/.versioneer-lookup
+++ b/.versioneer-lookup
@@ -15,9 +15,10 @@ HEAD
 \(detached.*
 
 # maintenance is currently the branch for preparation of maintenance release 1.2.9
-# so are any fix/... branches
+# so are any fix/... and improve/... branches
 maintenance 1.2.9 dedadbc9ac0305799e94ae279d3bca131629c4c5 pep440-dev
 fix/.* 1.2.9 dedadbc9ac0305799e94ae279d3bca131629c4c5 pep440-dev
+improve/.* 1.2.9 dedadbc9ac0305799e94ae279d3bca131629c4c5 pep440-dev
 
 # every other branch is a development branch and thus gets resolved to 1.3.0-dev for now
 .* 1.3.0 198d3450d94be1a2 pep440-dev