diff --git a/common.cfg b/common.cfg
index 6e3e031..69c8655 100644
--- a/common.cfg
+++ b/common.cfg
@@ -168,7 +168,7 @@ spirit.releaser =
 setuptools =
 sphinx-rtd-theme = 0.2.4
 zc.buildout =
-zest.releaser = 6.12.5
+zest.releaser = 6.15.0
 
 
 [zptlint]