diff --git a/.gitignore b/.gitignore
index 74cbf4d..17b7db3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,3 +18,4 @@ config.guess
 config.sub
 build
 deb-src
+yazpp.pc
diff --git a/IDMETA b/IDMETA
index 714b1d3..2e2639d 100644
--- a/IDMETA
+++ b/IDMETA
@@ -1,4 +1,4 @@
-DEBIAN_DIST="bookworm bullseye"
-UBUNTU_DIST="noble jammy focal"
+DEBIAN_DIST="bullseye bookworm trixie"
+UBUNTU_DIST="focal jammy noble"
 CENTOS_DIST="centos7 centos8 centos9"
-VERSION=1.9.0
+VERSION=1.9.1
diff --git a/Makefile.am b/Makefile.am
index 9346c06..1944bb4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,7 +11,7 @@ pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = yazpp.pc
 
 SPEC_FILE=$(PACKAGE).spec
-EXTRA_DIST= $(SPEC_FILE) IDMETA README LICENSE NEWS m4/id-config.sh \
+EXTRA_DIST= $(SPEC_FILE) IDMETA README.md LICENSE NEWS m4/id-config.sh \
 	yazpp-config.in m4/yaz.m4 m4/yazpp.m4 buildconf.sh Doxyfile.in
 
 dist-hook:
diff --git a/NEWS b/NEWS
index 06934c7..09944d1 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+--- 1.9.1 2026/01/06
+
+Build Debian trixie package
+
+Update URLs in documentation
+
 --- 1.9.0 2025/05/06
 
 Use new YAZ utility cql_transform_define_fname;
diff --git a/README b/README.md
similarity index 54%
rename from README
rename to README.md
index 65cf39a..d8779d4 100644
--- a/README
+++ b/README.md
@@ -1,48 +1,41 @@
-YAZ++ AKA yazpp - A C++ library for YAZ and a ZOOM C++ API.
-
-See the file LICENSE for details.
-
-Introduction
-------------
+## YAZ++ AKA yazpp - A C++ library for YAZ and a ZOOM C++ API.
 
 YAZ++ is a set of libraries and header files that make it easier to
 use the YAZ toolkit from C++, together with some utilities written
 using these libraries. It includes an implementation of the C++ binding
 for ZOOM.
 
-YAZ++ and ZOOM C++ use the same BSD-like license as YAZ - see LICENSE
+YAZ++ and ZOOM C++ use the same BSD-like license as YAZ - see [LICENSE](LICENSE)
 file for details.
 
-Documentation
--------------
+## Documentation
 
 The "doc" directory contains documentation in HTML and PDF.
 You can also read it online at https://www.indexdata.com/yazpp
 
-Overview
---------
+## Overview
 
 YAZ++ builds a programmers' library libyaz++.lib and a few
 applications:
 
-  yaz-my-client      basic client
-  yaz-my-server      basic server
-  zclient            basic ZOOM client
+*  yaz-my-client      basic client
+*  yaz-my-server      basic server
+*  zclient            basic ZOOM client
 
 Directory structure of the YAZ++ package:
 
-  -- src (C++ library)
-  -- zoom (C++ source for ZOOM)
-  -- include/yaz++ (C++ headers) 
-  -- win (Windows build files)
-  -- doc (DocBook-format documentation)
+* [src](src) C++ library
+* [zoom](zoom) C++ source for ZOOM
+* [include/yazpp](include/yazpp) C++ headers
+* [win](win) Windows build files
+* [doc](doc) DocBook-format documentation
 
-ZOOM-C++
---------
+## ZOOM-C++
 
 The ZOOM library in this distribution implements the ZOOM C++ binding
-described on the ZOOM web-site at 
-	https://zoom.z3950.org/bind/cplusplus/
+described on the
+[ZOOM C++ binding web-site](https://zoom.z3950.org/bind/cplusplus/).
+
 It provides a simple but powerful API for constructing Z39.50 client
 applications.  See the documentation in doc/zoom.xml for much more
 information.
diff --git a/debian/rules b/debian/rules
index 18ac1e8..7f8621c 100755
--- a/debian/rules
+++ b/debian/rules
@@ -25,4 +25,4 @@ override_dh_installchangelogs:
 
 override_dh_installdocs:
 	cp LICENSE debian/copyright
-	dh_installdocs -A README
+	dh_installdocs -A README.md
diff --git a/src/.gitignore b/src/.gitignore
index b6025e4..7806a0b 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -9,6 +9,8 @@ yazpp-config.in
 yaz-my-client
 yaz-my-server
 yaz-proxy
+test_gdu*
+test_query*
 *.lo
 *.o
 tstquery
diff --git a/src/Makefile.am b/src/Makefile.am
index e04526c..54ca7ba 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -8,7 +8,7 @@ TESTS = $(check_PROGRAMS)
 AM_CXXFLAGS = -I$(srcdir)/../include $(YAZINC)
 
 lib_LTLIBRARIES = libyazpp.la
-libyazpp_la_LDFLAGS=-version-info 7:0:1
+libyazpp_la_LDFLAGS=-version-info 7:1:1
 
 DISTCLEANFILES = yazpp-config
 
diff --git a/yazpp.spec b/yazpp.spec
index 56b72e0..9bb9c4d 100644
--- a/yazpp.spec
+++ b/yazpp.spec
@@ -61,7 +61,7 @@ rm -fr ${RPM_BUILD_ROOT}
 %postun -n libyazpp7 -p /sbin/ldconfig
 
 %files -n libyazpp7
-%doc README LICENSE NEWS
+%doc README.md LICENSE NEWS
 %defattr(-,root,root)
 %{_libdir}/*.so.*