diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index 89c6c7e3..b7da8f7d 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -466,9 +466,9 @@ foreach(build_type_upper
     set_property(TARGET expat PROPERTY ${build_type_upper}_POSTFIX ${EXPAT_${build_type_upper}_POSTFIX})
 endforeach()
 
-set(LIBCURRENT 10)  # sync
-set(LIBREVISION 3)  # with
-set(LIBAGE 9)       # configure.ac!
+set(LIBCURRENT 11)  # sync
+set(LIBREVISION 0)  # with
+set(LIBAGE 10)      # configure.ac!
 math(EXPR LIBCURRENT_MINUS_AGE "${LIBCURRENT} - ${LIBAGE}")
 
 if(NOT WIN32)
diff --git a/expat/Changes b/expat/Changes
index 0dfb39ff..fe0c515b 100644
--- a/expat/Changes
+++ b/expat/Changes
@@ -46,6 +46,9 @@ Release 2.6.4 ??? ??? ??? ????
             #904  tests: Resolve duplicate handler
        #317 #918  tests: Improve tests on doctype closing (ex CVE-2019-15903)
             #914  Fix signedness of format strings
+       #919 #920  Version info bumped from 10:3:9 (libexpat*.so.1.9.3)
+                    to 11:0:10 (libexpat*.so.1.10.0); see https://verbump.de/
+                    for what these numbers do
 
         Infrastructure:
             #907  CI: Upgrade Clang from 18 to 19
diff --git a/expat/configure.ac b/expat/configure.ac
index 1a930413..fffcd125 100644
--- a/expat/configure.ac
+++ b/expat/configure.ac
@@ -84,9 +84,9 @@ dnl
 dnl If the API changes incompatibly set LIBAGE back to 0
 dnl
 
-LIBCURRENT=10  # sync
-LIBREVISION=3  # with
-LIBAGE=9       # CMakeLists.txt!
+LIBCURRENT=11  # sync
+LIBREVISION=0  # with
+LIBAGE=10      # CMakeLists.txt!
 
 AC_CONFIG_HEADERS([expat_config.h])
 AH_TOP([#ifndef EXPAT_CONFIG_H