diff --git a/.github/workflows/distcheck.yml b/.github/workflows/distcheck.yml
index 3bafb225..90daba2d 100644
--- a/.github/workflows/distcheck.yml
+++ b/.github/workflows/distcheck.yml
@@ -36,8 +36,8 @@ jobs:
           make
           unxz --keep test/abi/abi-libFLAC-1.4.0.dump.xz
           unxz --keep test/abi/abi-libFLAC++-1.4.0.dump.xz
-          abi-compliance-checker -l flac -old test/abi/abi-libFLAC-1.4.0.dump -new test/abi/abi-descriptor-libFLAC-1.4.0.xml
-          abi-compliance-checker -l flac++ -old test/abi/abi-libFLAC++-1.4.0.dump -new test/abi/abi-descriptor-libFLAC++-1.4.0.xml
+          abi-compliance-checker -l flac -old test/abi/abi-libFLAC-1.4.0.dump -new test/abi/abi-descriptor-libFLAC-1.4.3.xml
+          abi-compliance-checker -l flac++ -old test/abi/abi-libFLAC++-1.4.0.dump -new test/abi/abi-descriptor-libFLAC++-1.4.3.xml
 
       - name: Check with flac test files
         run: ./src/flac/flac -t test-files/subset/*.flac test-files/uncommon/0[5-9]*.flac test-files/uncommon/10*.flac
diff --git a/doc/release_checklist.md b/doc/release_checklist.md
index ca826def..3a5a59d7 100644
--- a/doc/release_checklist.md
+++ b/doc/release_checklist.md
@@ -11,7 +11,8 @@
 1. Update changelog
 1. Check copyright year and update if applicable
 1. Check libFLAC and libFLAC++ for interface changes and update 
-    version numbers in include/FLAC/export.h, include/FLAC++/export.h
+    version numbers in include/FLAC/export.h, include/FLAC++/export.h,
+    src/libFLAC/Makefile.am, src/libFLAC++/Makefile.am,
     src/libFLAC/CMakeLists.txt and src/libFLAC++/CMakeLists.txt
 1. Prepare and check release tarball by running 
     `git clean -ffxd && ./autogen.sh && ./configure && make distcheck`
diff --git a/src/libFLAC++/CMakeLists.txt b/src/libFLAC++/CMakeLists.txt
index 51fe4c44..3be43ba1 100644
--- a/src/libFLAC++/CMakeLists.txt
+++ b/src/libFLAC++/CMakeLists.txt
@@ -16,7 +16,7 @@ target_include_directories(FLAC++ INTERFACE
 target_link_libraries(FLAC++ PUBLIC FLAC)
 if(BUILD_SHARED_LIBS)
     set_target_properties(FLAC++ PROPERTIES
-        VERSION 10.1.0
+        VERSION 10.0.1
         SOVERSION 10)
     if(NOT WIN32)
         set_target_properties(FLAC++ PROPERTIES CXX_VISIBILITY_PRESET hidden)
diff --git a/src/libFLAC++/Makefile.am b/src/libFLAC++/Makefile.am
index 692aeaac..0b2853b2 100644
--- a/src/libFLAC++/Makefile.am
+++ b/src/libFLAC++/Makefile.am
@@ -57,7 +57,7 @@ endif
 endif
 
 # see 'http://www.gnu.org/software/libtool/manual/libtool.html#Libtool-versioning' for numbering convention
-libFLAC___la_LDFLAGS = $(AM_LDFLAGS) -no-undefined -version-info 10:0:0 $(windows_resource_link)
+libFLAC___la_LDFLAGS = $(AM_LDFLAGS) -no-undefined -version-info 10:1:0 $(windows_resource_link)
 libFLAC___la_LIBADD = ../libFLAC/libFLAC.la
 libFLAC___la_SOURCES = $(libFLAC___sources)
 
diff --git a/src/libFLAC/CMakeLists.txt b/src/libFLAC/CMakeLists.txt
index 5e746277..cf7368f6 100644
--- a/src/libFLAC/CMakeLists.txt
+++ b/src/libFLAC/CMakeLists.txt
@@ -91,7 +91,7 @@ if(TARGET Ogg::ogg)
 endif()
 if(BUILD_SHARED_LIBS)
     set_target_properties(FLAC PROPERTIES
-        VERSION 13.0.0
+        VERSION 12.1.0
         SOVERSION 12)
     if(NOT WIN32)
         set_target_properties(FLAC PROPERTIES C_VISIBILITY_PRESET hidden)
diff --git a/src/libFLAC/Makefile.am b/src/libFLAC/Makefile.am
index 1f03f038..618939df 100644
--- a/src/libFLAC/Makefile.am
+++ b/src/libFLAC/Makefile.am
@@ -79,7 +79,7 @@ extra_ogg_sources = \
 endif
 
 # see 'http://www.gnu.org/software/libtool/manual/libtool.html#Libtool-versioning' for numbering convention
-libFLAC_la_LDFLAGS = $(AM_LDFLAGS) -no-undefined -version-info 12:0:0 $(windows_resource_link)
+libFLAC_la_LDFLAGS = $(AM_LDFLAGS) -no-undefined -version-info 13:0:1 $(windows_resource_link)
 
 libFLAC_sources = \
 	bitmath.c \
diff --git a/test/abi/abi-descriptor-libFLAC++-1.4.0.xml b/test/abi/abi-descriptor-libFLAC++-1.4.3.xml
similarity index 60%
rename from test/abi/abi-descriptor-libFLAC++-1.4.0.xml
rename to test/abi/abi-descriptor-libFLAC++-1.4.3.xml
index 4d19b282..18d6ccdd 100644
--- a/test/abi/abi-descriptor-libFLAC++-1.4.0.xml
+++ b/test/abi/abi-descriptor-libFLAC++-1.4.3.xml
@@ -1,5 +1,5 @@
 <version>
-    1.4.0
+    1.4.3
 </version>
 
 <headers>
@@ -7,5 +7,5 @@
 </headers>
 
 <libs>
-    src/libFLAC++/.libs/libFLAC++.so.10.0.0
+    src/libFLAC++/.libs/libFLAC++.so.10.0.1
 </libs>
diff --git a/test/abi/abi-descriptor-libFLAC-1.4.0.xml b/test/abi/abi-descriptor-libFLAC-1.4.3.xml
similarity index 62%
rename from test/abi/abi-descriptor-libFLAC-1.4.0.xml
rename to test/abi/abi-descriptor-libFLAC-1.4.3.xml
index 75f9b75a..1b083862 100644
--- a/test/abi/abi-descriptor-libFLAC-1.4.0.xml
+++ b/test/abi/abi-descriptor-libFLAC-1.4.3.xml
@@ -1,5 +1,5 @@
 <version>
-    1.4.0
+    1.4.3
 </version>
 
 <headers>
@@ -7,5 +7,5 @@
 </headers>
 
 <libs>
-    src/libFLAC/.libs/libFLAC.so.12.0.0
+    src/libFLAC/.libs/libFLAC.so.12.1.0
 </libs>