diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index d9219e8d..97e29353 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -465,9 +465,9 @@ foreach(build_type_upper
     set_property(TARGET expat PROPERTY ${build_type_upper}_POSTFIX ${EXPAT_${build_type_upper}_POSTFIX})
 endforeach()
 
-set(LIBCURRENT 9)    # sync
-set(LIBREVISION 10)  # with
-set(LIBAGE 8)        # configure.ac!
+set(LIBCURRENT 10)  # sync
+set(LIBREVISION 0)  # with
+set(LIBAGE 9)       # configure.ac!
 math(EXPR LIBCURRENT_MINUS_AGE "${LIBCURRENT} - ${LIBAGE}")
 
 if(NOT WIN32)
diff --git a/expat/Changes b/expat/Changes
index 0805b9a0..24f1ce63 100644
--- a/expat/Changes
+++ b/expat/Changes
@@ -68,6 +68,9 @@ Release 2.6.0 xxx xxxxxxx xx 2024
     #692 #703 ..
        #733 #772  Address compiler warnings
        #798 #800  Address clang-tidy warnings
+       #775 #776  Version info bumped from 9:10:8 (libexpat*.so.1.8.10)
+                    to 10:0:9 (libexpat*.so.1.9.0); see https://verbump.de/
+                    for what these numbers do
 
         Infrastructure:
        #700 #701  docs: Document security policy in file SECURITY.md
diff --git a/expat/configure.ac b/expat/configure.ac
index addbb10b..8449f3b6 100644
--- a/expat/configure.ac
+++ b/expat/configure.ac
@@ -82,9 +82,9 @@ dnl
 dnl If the API changes incompatibly set LIBAGE back to 0
 dnl
 
-LIBCURRENT=9    # sync
-LIBREVISION=10  # with
-LIBAGE=8        # CMakeLists.txt!
+LIBCURRENT=10  # sync
+LIBREVISION=0  # with
+LIBAGE=9       # CMakeLists.txt!
 
 AC_CONFIG_HEADERS([expat_config.h])
 AH_TOP([#ifndef EXPAT_CONFIG_H