diff --git a/ChangeLog b/ChangeLog
index fb773db..2d6e6d8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Version 1.0.0
+=============
+* Large number of fixes to widgets/drawing/sdl2 support
+* New widget InputBox
+* Memory leak fixes in MessageBox example
+* Python 3 fixes
+* Stability fixes
+
 Version 0.9.0
 =============
 * Guisan forked from Guisan
diff --git a/Doxyfile b/Doxyfile
index b77a42a..8c49ce1 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Guisan"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 0.9.0
+PROJECT_NUMBER         = 1.0.0
 
 # 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/SConstruct b/SConstruct
index d870aac..61ca7fe 100644
--- a/SConstruct
+++ b/SConstruct
@@ -6,7 +6,7 @@ env["CC"] = os.getenv("CC") or env["CC"]
 env["CXX"] = os.getenv("CXX") or env["CXX"]
 env["ENV"].update(x for x in os.environ.items() if x[0].startswith("CCC_"))
 
-env["LIBVER"] = "0.9.0"
+env["LIBVER"] = "1.0.0"
 
 env["PREFIX_PATH"] = ARGUMENTS.get('prefix', "/usr/local")
 env["INCLUDE_PATH"] = ARGUMENTS.get('include', env['PREFIX_PATH'] + "/include")
diff --git a/src/guisan.cpp b/src/guisan.cpp
index c8321d1..43b9bc2 100644
--- a/src/guisan.cpp
+++ b/src/guisan.cpp
@@ -63,6 +63,6 @@ extern "C"
 {
     const char* gcnGuisanVersion()
     {
-        return "0.9.0";
+        return "1.0.0";
     }
 }