diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index 6649d769..23c62883 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -466,7 +466,7 @@ foreach(build_type_upper
 endforeach()
 
 set(LIBCURRENT 10)  # sync
-set(LIBREVISION 0)  # with
+set(LIBREVISION 1)  # with
 set(LIBAGE 9)       # configure.ac!
 math(EXPR LIBCURRENT_MINUS_AGE "${LIBCURRENT} - ${LIBAGE}")
 
diff --git a/expat/Changes b/expat/Changes
index f5bf1bf8..71df8503 100644
--- a/expat/Changes
+++ b/expat/Changes
@@ -12,6 +12,9 @@ Release 2.6.1 XXX XXXXXXXXX XX XXXX
             #829  Hide test-only code behind new internal macro
             #833  Autotools: Reject expat_config.h.in defining SIZEOF_VOID_P
             #819  Address compiler warnings
+       #832 #834  Version info bumped from 10:0:9 (libexpat*.so.1.9.0)
+                    to 10:1:9 (libexpat*.so.1.9.1); see https://verbump.de/
+                    for what these numbers do
 
         Infrastructure:
             #818  CI: Adapt to breaking changes in clang-format
diff --git a/expat/configure.ac b/expat/configure.ac
index 87edcbd2..f9935f84 100644
--- a/expat/configure.ac
+++ b/expat/configure.ac
@@ -83,7 +83,7 @@ dnl If the API changes incompatibly set LIBAGE back to 0
 dnl
 
 LIBCURRENT=10  # sync
-LIBREVISION=0  # with
+LIBREVISION=1  # with
 LIBAGE=9       # CMakeLists.txt!
 
 AC_CONFIG_HEADERS([expat_config.h])