diff --git a/appveyor.yml b/appveyor.yml
index b9ed9a1d..ec15bb3b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 0.19.0.{build}
+version: 0.20.0.{build}
 
 platform:
   - x86
diff --git a/configure.ac b/configure.ac
index 6196dd54..805af85d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@ define([PRODUCT_TARNAME], [opensc])
 define([PRODUCT_BUGREPORT], [https://github.com/OpenSC/OpenSC/issues])
 define([PRODUCT_URL], [https://github.com/OpenSC/OpenSC])
 define([PACKAGE_VERSION_MAJOR], [0])
-define([PACKAGE_VERSION_MINOR], [19])
+define([PACKAGE_VERSION_MINOR], [20])
 define([PACKAGE_VERSION_FIX], [0])
 define([PACKAGE_SUFFIX], [])