diff --git a/README.md b/README.md
index 324de3d..7cc8a51 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 GammaLib information
 ====================
-* Version: 1.8.0.dev (18 September 2020)
+* Version: 2.0.0.dev (18 September 2020)
 
 [![Build Status](https://cta-jenkins.irap.omp.eu/buildStatus/icon?job=gammalib-integrate-os)](https://cta-jenkins.irap.omp.eu/job/gammalib-integrate-os/)
 
@@ -183,7 +183,7 @@ If everything works successfully you should see
 or
 
     ============================================================================
-    Testsuite summary for gammalib 1.8.0.dev
+    Testsuite summary for gammalib 2.0.0.dev
     ============================================================================
     # TOTAL: 21
     # PASS:  21
diff --git a/configure.ac b/configure.ac
index 27ad264..0d6a173 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@
 #############################################################################
 # Initialisation                                                            #
 #############################################################################
-AC_INIT([gammalib], [1.8.0.dev], [jurgen.knodlseder@irap.omp.eu], [gammalib])
+AC_INIT([gammalib], [2.0.0.dev], [jurgen.knodlseder@irap.omp.eu], [gammalib])
 AC_CONFIG_SRCDIR([src/support/GTools.cpp])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([.])
diff --git a/doc/Doxyfile b/doc/Doxyfile
index 09c2b08..09ecc09 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -32,7 +32,7 @@ PROJECT_NAME           = GammaLib
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 1.8.0.dev
+PROJECT_NUMBER         = 2.0.0.dev
 
 # 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
diff --git a/doc/source/admin/release_history/1.8.rst b/doc/source/admin/release_history/2.0.rst
index 03b95a1..03b95a1 100644
--- a/doc/source/admin/release_history/1.8.rst
+++ b/doc/source/admin/release_history/2.0.rst
diff --git a/doc/source/admin/release_history/index.rst b/doc/source/admin/release_history/index.rst
index c2126a2..2d9c95b 100644
--- a/doc/source/admin/release_history/index.rst
+++ b/doc/source/admin/release_history/index.rst
@@ -6,7 +6,7 @@ Release History
 .. toctree::
    :maxdepth: 1
 
-   GammaLib 1.8 <1.8>
+   GammaLib 2.0 <2.0>
    GammaLib 1.7.1 <1.7.1>
    GammaLib 1.7 <1.7>
    GammaLib 1.6.3 <1.6.3>
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 02a5f20..cf9152e 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -55,10 +55,10 @@ copyright = u'2006-2019, GammaLib developers'
 # built documents.
 #
 # The short X.Y version.
-version = '1.8'
+version = '2.0'
 
 # The full version, including alpha/beta/rc tags.
-release = '1.8.0.dev'
+release = '2.0.0.dev'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/sonar-project.properties b/sonar-project.properties
index 2bc1d64..95d726d 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -1,7 +1,7 @@
 # Required metadata
 sonar.projectKey=gammalib
 sonar.projectName=GammaLib
-sonar.projectVersion=1.8.0.dev
+sonar.projectVersion=2.0.0.dev
 
 # Description
 sonar.projectDescription="Versatile toolbox for scientific analysis of astronomical gamma-ray data"