diff --git a/base/modules/psb_const_mod.F90 b/base/modules/psb_const_mod.F90
index 5f229ac8..ee11beaf 100644
--- a/base/modules/psb_const_mod.F90
+++ b/base/modules/psb_const_mod.F90
@@ -136,10 +136,10 @@ module psb_const_mod
   !
   ! Version
   !
-  character(len=*), parameter    :: psb_version_string_ = "3.9.0"
+  character(len=*), parameter    :: psb_version_string_ = "3.9.1"
   integer(psb_ipk_), parameter   :: psb_version_major_  = 3
   integer(psb_ipk_), parameter   :: psb_version_minor_  = 9
-  integer(psb_ipk_), parameter   :: psb_patchlevel_     = 0
+  integer(psb_ipk_), parameter   :: psb_patchlevel_     = 1
 
   !
   !     Handy & miscellaneous constants