diff --git a/CMakeLists.txt b/CMakeLists.txt
index c6f0a7b..8e27bc2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,7 @@
 endif()
 
 set(POPPLER_MAJOR_VERSION "0")
-set(POPPLER_MINOR_VERSION "80")
+set(POPPLER_MINOR_VERSION "81")
 set(POPPLER_MICRO_VERSION "0")
 set(POPPLER_VERSION "${POPPLER_MAJOR_VERSION}.${POPPLER_MINOR_VERSION}.${POPPLER_MICRO_VERSION}")
 
@@ -497,7 +497,7 @@
 else()
 add_library(poppler ${poppler_SRCS})
 endif()
-set_target_properties(poppler PROPERTIES VERSION 90.0.0 SOVERSION 90)
+set_target_properties(poppler PROPERTIES VERSION 91.0.0 SOVERSION 91)
 if(MINGW AND BUILD_SHARED_LIBS)
     get_target_property(POPPLER_SOVERSION poppler SOVERSION)
     set_target_properties(poppler PROPERTIES SUFFIX "-${POPPLER_SOVERSION}${CMAKE_SHARED_LIBRARY_SUFFIX}")
diff --git a/NEWS b/NEWS
index 50d636e..d856bd2 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,11 @@
+Release 0.81.0:
+        core:
+         * Splash: Always enable support for CMYK rasterization
+         * CairoOutputDev: Check scaled dimensions for 0. Issue #737
+         * BaseCryptStream: Fix potential uninitialized memory read
+         * SplashBitmap: Fix wrong width condition for splashModeDeviceN8
+         * Fix crashes in malformed files
+
 Release 0.80.0:
         core:
          * Annotations: Implement support for setting a different text in the appearance stream than the real text
diff --git a/cpp/Doxyfile b/cpp/Doxyfile
index 085face..94321ab 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         = 0.80.0
+PROJECT_NUMBER         = 0.81.0
 
 # 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/Doxyfile b/qt5/src/Doxyfile
index b2fbb8e..b3626f8 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         = 0.80.0
+PROJECT_NUMBER         = 0.81.0
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.