diff --git a/ci/appveyor/sakia.iss b/ci/appveyor/sakia.iss
index 3ccdd8697b2e9743c45ea0ac8feea7e96b21e89d..792d7654eb146f9b61d69688776792fa5f185dc2 100644
--- a/ci/appveyor/sakia.iss
+++ b/ci/appveyor/sakia.iss
@@ -15,7 +15,7 @@
 #error "Unable to find MyAppExe"
 #endif
 
-#define MyAppVerStr "0.20.0dev14"
+#define MyAppVerStr "0.20.0dev15"
 
 [Setup]
 AppName={#MyAppName}
diff --git a/ci/travis/debian/DEBIAN/control b/ci/travis/debian/DEBIAN/control
index 9fe9c0abb4369bda3332589762bcfc37df7fe588..f4156004a2728d59973cf9298004cc2459ab2fb9 100644
--- a/ci/travis/debian/DEBIAN/control
+++ b/ci/travis/debian/DEBIAN/control
@@ -1,5 +1,5 @@
 Package: sakia
-Version: 0.20.0dev14
+Version: 0.20.0dev15
 Section: misc
 Priority: optional
 Architecture: all
diff --git a/src/sakia/__init__.py b/src/sakia/__init__.py
index 05a771340d7ce03b761050a442ef3103bb0ba938..3b8fc30bd881a681ff1c6e6dc8b59c1d76a93e67 100644
--- a/src/sakia/__init__.py
+++ b/src/sakia/__init__.py
@@ -1,2 +1,2 @@
-__version_info__ = ('0', '20', '0dev14')
+__version_info__ = ('0', '20', '0dev15')
 __version__ = '.'.join(__version_info__)