diff --git a/Doxyfile b/Doxyfile
index 2bb280c..b5b62b2 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -31,7 +31,7 @@ PROJECT_NAME = "MapMap"
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER = "0.5.0"
+PROJECT_NUMBER = "0.5.1"
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.
diff --git a/MM.cpp b/MM.cpp
index 119e8c9..6fb311d 100644
--- a/MM.cpp
+++ b/MM.cpp
@@ -23,7 +23,7 @@
 namespace mmp {
 
 const QString MM::APPLICATION_NAME = "MapMap";
-const QString MM::VERSION = "0.5.0";
+const QString MM::VERSION = "0.5.1";
 const QString MM::COPYRIGHT_OWNERS = "Sofian Audry, Dame Diongue, Alexandre Quessy, Mike Latona, Vasilis Liaskovitis";
 const QString MM::ORGANIZATION_NAME = "MapMap";
 const QString MM::ORGANIZATION_DOMAIN = "mapmap.info";
diff --git a/NEWS b/NEWS
index bb66a2a..2236a17 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,10 @@
 Release notes for MapMap
 ========================
 
+2017-0?-?? - MapMap 0.5.1
+-------------------------
+* in progress
+
 2017-01-01 - MapMap 0.5.0
 -------------------------
 * Fix bug: it was impossible to get out of test signal mode by pressing ESC.
diff --git a/VERSION.txt b/VERSION.txt
index 8f0916f..4b9fcbe 100644
--- a/VERSION.txt
+++ b/VERSION.txt
@@ -1 +1 @@
-0.5.0
+0.5.1
diff --git a/mapmap.pro b/mapmap.pro
index 3f0b096..9f6acb0 100644
--- a/mapmap.pro
+++ b/mapmap.pro
@@ -1,7 +1,7 @@
 CONFIG  += qt debug c++11
 TEMPLATE = app
 # Always use major.minor.micro version number format
-VERSION = 0.5.0
+VERSION = 0.5.1
 TARGET = mapmap
 QT += gui opengl xml core network
 greaterThan(QT_MAJOR_VERSION, 4) {