diff --git a/.versioneer-lookup b/.versioneer-lookup
index d424da4d..1042df93 100644
--- a/.versioneer-lookup
+++ b/.versioneer-lookup
@@ -16,11 +16,11 @@ prerelease
 HEAD
 \(detached.*
 
-# maintenance is currently the branch for preparation of maintenance release 1.2.17
+# maintenance is currently the branch for preparation of maintenance release 1.3.1
 # so are any fix/... and improve/... branches
-maintenance 1.2.17 354042b84d488db38ac1917bb69bd164f4e7f750 pep440-dev
-fix/.* 1.2.17 354042b84d488db38ac1917bb69bd164f4e7f750 pep440-dev
-improve/.* 1.2.17 354042b84d488db38ac1917bb69bd164f4e7f750 pep440-dev
+maintenance 1.3.1 7f5d03d0549bcbd26f40e7e4a3297ea5204fb1cc pep440-dev
+fix/.* 1.3.1 7f5d03d0549bcbd26f40e7e4a3297ea5204fb1cc pep440-dev
+improve/.* 1.3.1 7f5d03d0549bcbd26f40e7e4a3297ea5204fb1cc 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
+# every other branch is a development branch and thus gets resolved to 1.4.0-dev for now
+.* 1.4.0 7f5d03d0549bcbd26f40e7e4a3297ea5204fb1cc pep440-dev