diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5ed0b44..7d34c69 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@
 CHECK_FILE_OFFSET_BITS()
 
 set(POPPLER_MAJOR_VERSION "0")
-set(POPPLER_MINOR_VERSION "30")
+set(POPPLER_MINOR_VERSION "31")
 set(POPPLER_MICRO_VERSION "0")
 set(POPPLER_VERSION "${POPPLER_MAJOR_VERSION}.${POPPLER_MINOR_VERSION}.${POPPLER_MICRO_VERSION}")
 
@@ -469,7 +469,7 @@
 else(MSVC)
 add_library(poppler SHARED ${poppler_SRCS})
 endif(MSVC)
-set_target_properties(poppler PROPERTIES VERSION 49.0.0 SOVERSION 49)
+set_target_properties(poppler PROPERTIES VERSION 50.0.0 SOVERSION 50)
 target_link_libraries(poppler ${poppler_LIBS})
 target_link_libraries(poppler LINK_INTERFACE_LIBRARIES "")
 install(TARGETS poppler RUNTIME DESTINATION bin LIBRARY DESTINATION lib${LIB_SUFFIX} ARCHIVE DESTINATION lib${LIB_SUFFIX})
diff --git a/NEWS b/NEWS
index 2ff8e17..01f4a66 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,20 @@
+Release 0.31.0
+        core:
+         * CairoOutputDev: support embedding JBIG2 image data
+         * Accept malformed documents whose root is a Page instead of a Pages. Bug #88172
+         * Fix crash on broken documents
+         * JPEG2000Stream: Inline doGetChar and doLookChar
+         * GlobalParams cleaning
+
+        utils:
+         * pdftops: Add rasterization option. Bug #85934
+
+        qt4:
+         * Expose whole-words search option
+
+        qt5:
+         * Expose whole-words search option
+
 Release 0.30.0
         core:
          * Openjpeg2 support (openjpeg 1 is preferred). Bug #58906
diff --git a/configure.ac b/configure.ac
index b6429cf..3f43c0e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 m4_define([poppler_version_major],[0])
-m4_define([poppler_version_minor],[30])
+m4_define([poppler_version_minor],[31])
 m4_define([poppler_version_micro],[0])
 m4_define([poppler_version],[poppler_version_major.poppler_version_minor.poppler_version_micro])
 
diff --git a/cpp/Doxyfile b/cpp/Doxyfile
index 4d42884..842b667 100644
--- a/cpp/Doxyfile
+++ b/cpp/Doxyfile
@@ -31,7 +31,7 @@
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.30.0
+PROJECT_NUMBER         = 0.31.0
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.
diff --git a/poppler/CairoOutputDev.cc b/poppler/CairoOutputDev.cc
index a770320..a86ec12 100644
--- a/poppler/CairoOutputDev.cc
+++ b/poppler/CairoOutputDev.cc
@@ -28,6 +28,7 @@
 // Copyright (C) 2011-2014 Thomas Freitag <Thomas.Freitag@alfa.de>
 // Copyright (C) 2012 Patrick Pfeifer <p2000@mailinator.com>
 // Copyright (C) 2012 Jason Crain <jason@aquaticape.us>
+// Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
 //
 // To see a description of the changes please see the Changelog file that
 // came with your tarball or type make ChangeLog if you are building from git
diff --git a/poppler/CairoOutputDev.h b/poppler/CairoOutputDev.h
index cc29846..33dde0c 100644
--- a/poppler/CairoOutputDev.h
+++ b/poppler/CairoOutputDev.h
@@ -21,6 +21,7 @@
 // Copyright (C) 2008, 2009, 2011-2014 Adrian Johnson <ajohnson@redneon.com>
 // Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
 // Copyright (C) 2010-2013 Thomas Freitag <Thomas.Freitag@alfa.de>
+// Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
 //
 // To see a description of the changes please see the Changelog file that
 // came with your tarball or type make ChangeLog if you are building from git
diff --git a/poppler/JBIG2Stream.cc b/poppler/JBIG2Stream.cc
index 8e1c12f..66c1d25 100644
--- a/poppler/JBIG2Stream.cc
+++ b/poppler/JBIG2Stream.cc
@@ -22,6 +22,7 @@
 // Copyright (C) 2012 Thomas Freitag <Thomas.Freitag@alfa.de>
 // Copyright (C) 2013 Adrian Johnson <ajohnson@redneon.com>
 // Copyright (C) 2013, 2014 Fabio D'Urso <fabiodurso@hotmail.it>
+// Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
 //
 // To see a description of the changes please see the Changelog file that
 // came with your tarball or type make ChangeLog if you are building from git
diff --git a/poppler/JBIG2Stream.h b/poppler/JBIG2Stream.h
index 7ffc441..1e14c5c 100644
--- a/poppler/JBIG2Stream.h
+++ b/poppler/JBIG2Stream.h
@@ -15,6 +15,7 @@
 //
 // Copyright (C) 2009 David Benjamin <davidben@mit.edu>
 // Copyright (C) 2013 Adrian Johnson <ajohnson@redneon.com>
+// Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
 //
 // To see a description of the changes please see the Changelog file that
 // came with your tarball or type make ChangeLog if you are building from git
diff --git a/poppler/Makefile.am b/poppler/Makefile.am
index e0c98d8..9a623af 100644
--- a/poppler/Makefile.am
+++ b/poppler/Makefile.am
@@ -296,7 +296,7 @@
 	$(win32_libs)
 
 libpoppler_la_LDFLAGS =				\
-	-version-info 49:0:0			\
+	-version-info 50:0:0			\
 	@create_shared_lib@			\
 	@auto_import_flags@
 
diff --git a/poppler/Stream.cc b/poppler/Stream.cc
index 8996e29..d2dd761 100644
--- a/poppler/Stream.cc
+++ b/poppler/Stream.cc
@@ -30,6 +30,7 @@
 // Copyright (C) 2013 Adrian Johnson <ajohnson@redneon.com>
 // Copyright (C) 2013 Adam Reichold <adamreichold@myopera.com>
 // Copyright (C) 2013 Pino Toscano <pino@kde.org>
+// Copyright (C) 2015 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp>
 //
 // To see a description of the changes please see the Changelog file that
 // came with your tarball or type make ChangeLog if you are building from git
diff --git a/qt4/src/CMakeLists.txt b/qt4/src/CMakeLists.txt
index fe7d620..4a2c69a 100644
--- a/qt4/src/CMakeLists.txt
+++ b/qt4/src/CMakeLists.txt
@@ -30,7 +30,7 @@
 )
 qt4_automoc(${poppler_qt4_SRCS})
 add_library(poppler-qt4 SHARED ${poppler_qt4_SRCS})
-set_target_properties(poppler-qt4 PROPERTIES VERSION 4.5.0 SOVERSION 4)
+set_target_properties(poppler-qt4 PROPERTIES VERSION 4.6.0 SOVERSION 4)
 target_link_libraries(poppler-qt4 poppler ${QT4_QTCORE_LIBRARY} ${QT4_QTGUI_LIBRARY} ${QT4_QTXML_LIBRARY})
 if(MSVC)
 target_link_libraries(poppler-qt4 poppler ${poppler_LIBS})
diff --git a/qt4/src/Doxyfile b/qt4/src/Doxyfile
index e63e521..eee8a78 100644
--- a/qt4/src/Doxyfile
+++ b/qt4/src/Doxyfile
@@ -31,7 +31,7 @@
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.30.0
+PROJECT_NUMBER         = 0.31.0
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.
diff --git a/qt4/src/Makefile.am b/qt4/src/Makefile.am
index fc5412e..f993aa8 100644
--- a/qt4/src/Makefile.am
+++ b/qt4/src/Makefile.am
@@ -60,7 +60,7 @@
 	$(POPPLER_QT4_LIBS)
 
 libpoppler_qt4_la_LDFLAGS =			\
-	-version-info 9:0:5			\
+	-version-info 10:0:6			\
 	@create_shared_lib@			\
 	@auto_import_flags@
 
diff --git a/qt5/src/CMakeLists.txt b/qt5/src/CMakeLists.txt
index 423c77e..da01f07 100644
--- a/qt5/src/CMakeLists.txt
+++ b/qt5/src/CMakeLists.txt
@@ -32,7 +32,7 @@
   ArthurOutputDev.cc
 )
 add_library(poppler-qt5 SHARED ${poppler_qt5_SRCS})
-set_target_properties(poppler-qt5 PROPERTIES VERSION 1.2.0 SOVERSION 1)
+set_target_properties(poppler-qt5 PROPERTIES VERSION 1.3.0 SOVERSION 1)
 target_link_libraries(poppler-qt5 poppler ${Qt5Core_LIBRARIES} ${Qt5Gui_LIBRARIES} ${Qt5Xml_LIBRARIES})
 if(MSVC)
 target_link_libraries(poppler-qt5 poppler ${poppler_LIBS})
diff --git a/qt5/src/Doxyfile b/qt5/src/Doxyfile
index 4f4bbcd..43253df 100644
--- a/qt5/src/Doxyfile
+++ b/qt5/src/Doxyfile
@@ -31,7 +31,7 @@
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.30.0
+PROJECT_NUMBER         = 0.31.0
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.
diff --git a/qt5/src/Makefile.am b/qt5/src/Makefile.am
index 73e62af..03df30f 100644
--- a/qt5/src/Makefile.am
+++ b/qt5/src/Makefile.am
@@ -60,7 +60,7 @@
 	$(POPPLER_QT5_LIBS)
 
 libpoppler_qt5_la_LDFLAGS =			\
-	-version-info 3:0:2			\
+	-version-info 4:0:3			\
 	@create_shared_lib@			\
 	@auto_import_flags@