diff --git a/docs/Doxyfile b/docs/Doxyfile
index 482fae3d9..d6c461d6c 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -31,7 +31,7 @@ PROJECT_NAME           = ChibiOS/RT
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 1.2.0
+PROJECT_NUMBER         = 1.3.0
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.
diff --git a/src/include/ch.h b/src/include/ch.h
index 94dcf8fa0..fa11c169b 100644
--- a/src/include/ch.h
+++ b/src/include/ch.h
@@ -35,7 +35,7 @@
 /**
  * Kernel version string.
  */
-#define CH_KERNEL_VERSION       "1.2.0"
+#define CH_KERNEL_VERSION       "1.3.0unstable"
 
 /**
  * Kernel version major number.
@@ -45,7 +45,7 @@
 /**
  * Kernel version minor number.
  */
-#define CH_KERNEL_MINOR         2
+#define CH_KERNEL_MINOR         3
 
 /**
  * Kernel version patch number.