diff --git a/configure.ac b/configure.ac
index 35739eb81..0cda21fc6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,7 +16,7 @@
 # problem to the user.
 AC_PREREQ([2.59])
 
-m4_define([ngspice_major_version], [41+])
+m4_define([ngspice_major_version], [42])
 m4_define([ngspice_minor_version], [0])
 m4_define([ngspice_version],
       [ngspice_major_version])
@@ -117,8 +117,8 @@ LT_INIT([shared static])
 #  --> Set 'LT_NGSPICE_AGE' to 0.
 
 LT_NGSPICE_CURRENT=0
-LT_NGSPICE_REVISION=8
-LT_NGSPICE_AGE=1
+LT_NGSPICE_REVISION=9
+LT_NGSPICE_AGE=2
 LIBNGSPICE_SO_VERSION=$LT_NGSPICE_CURRENT.$LT_NGSPICE_REVISION.$LT_NGSPICE_AGE
 
 # Announce the libtool version
diff --git a/src/include/ngspice/sharedspice.h b/src/include/ngspice/sharedspice.h
index 1082d0c24..6719533f5 100644
--- a/src/include/ngspice/sharedspice.h
+++ b/src/include/ngspice/sharedspice.h
@@ -104,7 +104,7 @@ are of type bool if sharedspice.h is used externally.
 */
 
 #ifndef NGSPICE_PACKAGE_VERSION
-#define NGSPICE_PACKAGE_VERSION "41+"
+#define NGSPICE_PACKAGE_VERSION "42"
 #endif
 /* we have NG_BOOL instead of BOOL */
 #ifndef HAS_NG_BOOL
diff --git a/visualc/src/include/ngspice/config.h b/visualc/src/include/ngspice/config.h
index 65874de17..43e4aa7ad 100644
--- a/visualc/src/include/ngspice/config.h
+++ b/visualc/src/include/ngspice/config.h
@@ -15,7 +15,7 @@
 #define PACKAGE "ngspice"
 
 /* Version number of package */
-#define VERSION "41+"
+#define VERSION "42"
 
 /* Define the directory for executables */
 #define NGSPICEBINDIR "../bin"