diff --git a/configure.ac b/configure.ac
index 95ea96052..6f6782829 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,7 @@
 # ---------------
 
 # Initialisation of configure
-AC_INIT([ngspice], [27], [http://ngspice.sourceforge.net/bugrep.html])
+AC_INIT([ngspice], [28], [http://ngspice.sourceforge.net/bugrep.html])
 
 # Unique file in the source directory
 AC_CONFIG_SRCDIR([src/ngspice.c])
diff --git a/src/sharedspice.c b/src/sharedspice.c
index 53aebbf48..5e1ce4996 100644
--- a/src/sharedspice.c
+++ b/src/sharedspice.c
@@ -10,7 +10,7 @@
 /*******************/
 
 #ifdef _MSC_VER
-#define SHAREDSPICE_version "25.1"
+#define SHAREDSPICE_version "28.0"
 #define STDIN_FILENO    0
 #define STDOUT_FILENO   1
 #define STDERR_FILENO   2
diff --git a/visualc/src/include/ngspice/config.h b/visualc/src/include/ngspice/config.h
index 642023e90..3cfc075f8 100644
--- a/visualc/src/include/ngspice/config.h
+++ b/visualc/src/include/ngspice/config.h
@@ -476,13 +476,13 @@
 #define PACKAGE_NAME "ngspice"
 
 /* Define to the full name and version of this package. */
-#define PACKAGE_STRING "ngspice 27"
+#define PACKAGE_STRING "ngspice 28"
 
 /* Define to the one symbol short name of this package. */
 #define PACKAGE_TARNAME "ngspice"
 
 /* Define to the version of this package. */
-#define PACKAGE_VERSION "27"
+#define PACKAGE_VERSION "28"
 
 /* Define if we want predictor algorithm */
 /* #undef PREDICTOR */
@@ -537,7 +537,7 @@
 /* #undef TM_IN_SYS_TIME */
 
 /* Version number of package */
-#define VERSION "27"
+#define VERSION "28"
 
 /* Define if we want spice2 sensitivity analysis */
 /* #undef WANT_SENSE2 */