diff --git a/Doxyfile b/Doxyfile
index bde6b3a6..bc4d1c21 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = SPEC
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 3.11
+PROJECT_NUMBER         = 3.20
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/src/global.f90 b/src/global.f90
index f3928179..d87d1884 100644
--- a/src/global.f90
+++ b/src/global.f90
@@ -66,7 +66,7 @@ module constants
   REAL, parameter :: mu0        =   2.0E-07 * pi2       !< \f$4\pi\cdot10^{-7}\f$
   REAL, parameter :: goldenmean =   1.618033988749895   !< golden mean = \f$( 1 + \sqrt 5 ) / 2\f$ ;
 
-  REAL, parameter :: version    =   3.10  !< version of SPEC
+  REAL, parameter :: version    =   3.20  !< version of SPEC
 
 end module constants