diff --git a/product.version b/product.version
index bc80560f..ec802c66 100644
--- a/product.version
+++ b/product.version
@@ -1 +1 @@
-1.5.0
+1.5.1-dev
diff --git a/tools/buildbot/build_type b/tools/buildbot/build_type
index 17640be7..38f8e886 100644
--- a/tools/buildbot/build_type
+++ b/tools/buildbot/build_type
@@ -1 +1 @@
-rel
+dev