diff --git a/.github/workflows/mamonsu-tests-dev.yml b/.github/workflows/mamonsu-tests-dev.yml
index 6a09598..3f68f9b 100644
--- a/.github/workflows/mamonsu-tests-dev.yml
+++ b/.github/workflows/mamonsu-tests-dev.yml
@@ -61,7 +61,7 @@ jobs:
           echo "zabbix_address=$(hostname -I | awk '{print $1}')" >> $GITHUB_OUTPUT
         id: zabbix_address
       - name: Edit Zabbix address in agent.conf
-        run: sed -i "s/\(address *= *\).*/\1 ${{ steps.zabbix_address.outputs.zabbix_address }}/" ${{ env.MAMONSU_PATH }}/github-actions-tests/sources/agent_3.5.5.conf
+        run: sed -i "s/\(address *= *\).*/\1 ${{ steps.zabbix_address.outputs.zabbix_address }}/" ${{ env.MAMONSU_PATH }}/github-actions-tests/sources/agent_3.5.6.conf
 
       - name: Copy test scripts to container
         run: docker exec $( echo "${{ matrix.docker_os }}" | sed 's/://' | sed 's/\.//' ) mkdir -p -m 755 /mamonsu/
diff --git a/.github/workflows/mamonsu-tests-master.yml b/.github/workflows/mamonsu-tests-master.yml
index e10ecec..bdc9b87 100644
--- a/.github/workflows/mamonsu-tests-master.yml
+++ b/.github/workflows/mamonsu-tests-master.yml
@@ -65,7 +65,7 @@ jobs:
           echo "zabbix_address=$(hostname -I | awk '{print $1}')" >> $GITHUB_OUTPUT
         id: zabbix_address
       - name: Edit Zabbix address in agent.conf
-        run: sed -i "s/\(address *= *\).*/\1 ${{ steps.zabbix_address.outputs.zabbix_address }}/" ${{ env.MAMONSU_PATH }}/github-actions-tests/sources/agent_3.5.5.conf
+        run: sed -i "s/\(address *= *\).*/\1 ${{ steps.zabbix_address.outputs.zabbix_address }}/" ${{ env.MAMONSU_PATH }}/github-actions-tests/sources/agent_3.5.6.conf
 
       - name: Copy test scripts to container
         run: docker exec $( echo "${{ matrix.docker_os }}" | sed 's/://' | sed 's/\.//' ) mkdir -p -m 755 /mamonsu/
diff --git a/github-actions-tests/mamonsu_build.sh b/github-actions-tests/mamonsu_build.sh
index f96d2b2..9bc41a8 100644
--- a/github-actions-tests/mamonsu_build.sh
+++ b/github-actions-tests/mamonsu_build.sh
@@ -41,7 +41,7 @@ if [ "${OS%:*}" = "centos" ]; then
     python3 setup.py build && python3 setup.py install
     make rpm
     sudo rpm -i ./mamonsu*.rpm
-    cat /mamonsu/github-actions-tests/sources/agent_3.5.5.conf > /etc/mamonsu/agent.conf
+    cat /mamonsu/github-actions-tests/sources/agent_3.5.6.conf > /etc/mamonsu/agent.conf
     systemctl daemon-reload
     systemctl restart mamonsu
     sleep 5
@@ -64,7 +64,7 @@ elif [ "${OS%:*}" = "ubuntu" ]; then
     python3 setup.py build && python3 setup.py install
     make deb
     sudo dpkg -i ./mamonsu*.deb
-    cat /mamonsu/github-actions-tests/sources/agent_3.5.5.conf > /etc/mamonsu/agent.conf
+    cat /mamonsu/github-actions-tests/sources/agent_3.5.6.conf > /etc/mamonsu/agent.conf
     service mamonsu restart
     sleep 5
     echo && echo && echo "mamonsu version:"
diff --git a/github-actions-tests/sources/agent_3.5.5.conf b/github-actions-tests/sources/agent_3.5.6.conf
similarity index 100%
rename from github-actions-tests/sources/agent_3.5.5.conf
rename to github-actions-tests/sources/agent_3.5.6.conf
diff --git a/mamonsu/__init__.py b/mamonsu/__init__.py
index 458c253..fd51313 100644
--- a/mamonsu/__init__.py
+++ b/mamonsu/__init__.py
@@ -1,7 +1,7 @@
 __author__ = 'Dmitry Vasilyev'
 __author_email__ = 'info@postgrespro.ru'
 __description__ = 'Monitoring agent for PostgreSQL'
-__version__ = '3.5.5'
+__version__ = '3.5.6'
 __licence__ = 'BSD'
 
 __url__ = 'https://github.com/postgrespro/mamonsu'
diff --git a/packaging/debian/changelog b/packaging/debian/changelog
index 64a6fdc..572ab19 100644
--- a/packaging/debian/changelog
+++ b/packaging/debian/changelog
@@ -1,3 +1,6 @@
+mamonsu (3.5.6-1) stable; urgency=low
+  * changed pg_locks plugin metrics names. Warning: custom user-defined triggers and processing functions may be broken if they use item.name parameter.;
+
 mamonsu (3.5.5-1) stable; urgency=low
   * fixed types mismatch for pgpro_stats and pg_wait_sampling;
 
diff --git a/packaging/rpm/SPECS/mamonsu.spec b/packaging/rpm/SPECS/mamonsu.spec
index 37d3e98..bfd0df7 100644
--- a/packaging/rpm/SPECS/mamonsu.spec
+++ b/packaging/rpm/SPECS/mamonsu.spec
@@ -1,5 +1,5 @@
 Name:           mamonsu
-Version:        3.5.5
+Version:        3.5.6
 Release:        1%{?dist}
 Summary:        Monitoring agent for PostgreSQL
 Group:          Applications/Internet
@@ -73,6 +73,9 @@ chown -R mamonsu.mamonsu /var/log/mamonsu
 chown -R mamonsu.mamonsu /etc/mamonsu
 
 %changelog
+* Thu Jan 11 2024 Alexandra Kuznetsova <a.kuznetsova@postgrespro.ru>  - 3.5.6-1
+  - changed pg_locks plugin metrics names. Warning: custom user-defined triggers and processing functions may be broken if they use item.name parameter.;
+
 * Tue Jun 13 2023 Alexandra Kuznetsova <a.kuznetsova@postgrespro.ru>  - 3.5.5-1
   - fixed types mismatch for pgpro_stats and pg_wait_sampling;
 
diff --git a/packaging/win/mamonsu.def.nsh b/packaging/win/mamonsu.def.nsh
index 91851a7..22b5c68 100644
--- a/packaging/win/mamonsu.def.nsh
+++ b/packaging/win/mamonsu.def.nsh
@@ -1,5 +1,5 @@
 !define NAME Mamonsu
-!define VERSION 3.5.5
+!define VERSION 3.5.6
 !define MAMONSU_REG_PATH "Software\PostgresPro\Mamonsu"
 !define MAMONSU_REG_UNINSTALLER_PATH "Software\Microsoft\Windows\CurrentVersion\Uninstall"
 !define EDB_REG "SOFTWARE\Postgresql"