diff --git a/CMakeLists.txt b/CMakeLists.txt
index b472fc5d..22ad608f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -85,9 +85,9 @@ endif()
 # 2. If any interfaces have been added, removed, or changed since the last update, increment current, and set revision to 0.
 # 3. If any interfaces have been added since the last public release, then increment age.
 # 4. If any interfaces have been removed since the last public release, then set age to 0.
-set(TAGLIB_SOVERSION_CURRENT  19)
+set(TAGLIB_SOVERSION_CURRENT  20)
 set(TAGLIB_SOVERSION_REVISION 0)
-set(TAGLIB_SOVERSION_AGE      18)
+set(TAGLIB_SOVERSION_AGE      19)
 
 math(EXPR TAGLIB_SOVERSION_MAJOR "${TAGLIB_SOVERSION_CURRENT} - ${TAGLIB_SOVERSION_AGE}")
 math(EXPR TAGLIB_SOVERSION_MINOR "${TAGLIB_SOVERSION_AGE}")
diff --git a/NEWS b/NEWS
index aa6c2c53..3ae66ba8 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,27 @@
+==========================
+
+ * Added interface StreamTypeResolver to support streams which cannot be
+   fopen()'ed, e.g. network files.
+ * Added MP4::File::strip() to remove meta atom from MP4 file.
+ * Added Map::value() to look up without creating entry.
+ * Use property "WORK" instead of "CONTENTGROUP" for ID3v2 "TIT1" frame,
+   use property "WORK" for ASF "WM/ContentGroupDescription",
+   use property "COMPILATION" for ID3v2 "TCMP" frame.
+ * Build system improvements: option WITH_ZLIB, BUILD_TESTING instead of
+   BUILD_TESTS, GNUInstallDirs, FeatureSummary, tests with BUILD_SHARED_LIBS,
+   cross compilation with Buildroot, systems without HAVE_GCC_ATOMIC, Clang.
+ * Fixed heap-buffer-overflows when handling ASF, APE, FLAC, ID3v2, MP4, MPC
+   tags. 
+ * Fixed detection of invalid file by extension when correct type can be
+   detected by contents.
+ * Fixed unnecessary creation of map entries in APE and FLAC tags if looked up
+   tag does not exist.
+ * Fixed parsing of MP4 non-full meta atoms.
+ * Fixed potential ID3v1 false positive in the presence of an APE tag.
+ * Fixed ID3v2 version handling for frames embedded in CHAP or CTOC frames.
+ * Fixed parsing of multiple strings with a single BOM in ID3v2.4.0.
+ * Fixed several smaller issues reported by clang-tidy.
+
 TagLib 1.12 (Feb 16, 2021)
 ==========================
 
diff --git a/cmake/modules/FindCppUnit.cmake b/cmake/modules/FindCppUnit.cmake
index adaaeb61..f983e109 100644
--- a/cmake/modules/FindCppUnit.cmake
+++ b/cmake/modules/FindCppUnit.cmake
@@ -33,7 +33,7 @@ ELSE(CPPUNIT_INCLUDE_DIR AND CPPUNIT_LIBRARIES)
         FIND_PATH(CPPUNIT_CFLAGS cppunit/TestRunner.h PATHS /usr/include /usr/local/include )
         FIND_LIBRARY(CPPUNIT_LIBRARIES NAMES cppunit PATHS /usr/lib /usr/local/lib )
         # how can we find cppunit version?
-        MESSAGE (STATUS "Ensure you cppunit installed version is at least ${CPPUNIT_MIN_VERSION}")
+        MESSAGE (STATUS "Ensure your cppunit installed version is at least ${CPPUNIT_MIN_VERSION}")
         SET (CPPUNIT_INSTALLED_VERSION ${CPPUNIT_MIN_VERSION})
     ENDIF(CPPUNIT_CONFIG_EXECUTABLE)
 
diff --git a/taglib/toolkit/taglib.h b/taglib/toolkit/taglib.h
index ffce61f7..8ea0b99b 100644
--- a/taglib/toolkit/taglib.h
+++ b/taglib/toolkit/taglib.h
@@ -29,7 +29,7 @@
 #include "taglib_config.h"
 
 #define TAGLIB_MAJOR_VERSION 1
-#define TAGLIB_MINOR_VERSION 12
+#define TAGLIB_MINOR_VERSION 13
 #define TAGLIB_PATCH_VERSION 0
 
 #if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 1)) || defined(__clang__)