diff --git a/02-pr607-pcsd-ruby-adjust-to-json-2_6_3-error-message-change.patch b/02-pr607-pcsd-ruby-adjust-to-json-2_6_3-error-message-change.patch
new file mode 100644
index 0000000..abe3738
--- /dev/null
+++ b/02-pr607-pcsd-ruby-adjust-to-json-2_6_3-error-message-change.patch
@@ -0,0 +1,37 @@
+From 72c611ee995f248d7dcf2eb081ca8543dde57c03 Mon Sep 17 00:00:00 2001
+From: Mamoru TASAKA <mtasaka@fedoraproject.org>
+Date: Thu, 8 Dec 2022 22:47:59 +0900
+Subject: [PATCH] pcsd ruby: adjust to json 2.6.3 error message change
+
+json 2.6.3 now removes line number information from parser
+error message.
+Adjust regex pattern on pcs test code for ruby to support
+this error format.
+
+Fixes #606 .
+---
+ pcsd/test/test_config.rb | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/pcsd/test/test_config.rb b/pcsd/test/test_config.rb
+index 7aaf43498..a580b24fa 100644
+--- a/pcsd/test/test_config.rb
++++ b/pcsd/test/test_config.rb
+@@ -126,7 +126,7 @@ def test_parse_malformed()
+     assert_equal('error', $logger.log[0][0])
+     assert_match(
+       # the number is based on JSON gem version
+-      /Unable to parse pcs_settings file: \d+: unexpected token/,
++      /Unable to parse pcs_settings file: (\d+: )?unexpected token/,
+       $logger.log[0][1]
+     )
+     assert_equal(fixture_empty_config, cfg.text)
+@@ -723,7 +723,7 @@ def test_parse_malformed()
+     assert_equal('error', $logger.log[0][0])
+     assert_match(
+       # the number is based on JSON gem version
+-      /Unable to parse known-hosts file: \d+: unexpected token/,
++      /Unable to parse known-hosts file: (\d+: )?unexpected token/,
+       $logger.log[0][1]
+     )
+     assert_empty_data(cfg)
diff --git a/pcs.spec b/pcs.spec
index a876125..9aba994 100644
--- a/pcs.spec
+++ b/pcs.spec
@@ -1,6 +1,6 @@
 Name: pcs
 Version: 0.11.3
-Release: 4%{?dist}
+Release: 5%{?dist}
 # https://docs.fedoraproject.org/en-US/packaging-guidelines/LicensingGuidelines/
 # https://fedoraproject.org/wiki/Licensing:Main?rd=Licensing#Good_Licenses
 # GPLv2: pcs
@@ -50,6 +50,8 @@ Source101: https://github.com/ClusterLabs/pcs-web-ui/releases/download/%{ui_comm
 # pcs patches: <= 200
 # Patch0: name.patch
 Patch0: bz2123389-01-fix-ruby-socket-permissions.patch
+# https://github.com/ClusterLabs/pcs/pull/607
+Patch1: 02-pr607-pcsd-ruby-adjust-to-json-2_6_3-error-message-change.patch
 
 # ui patches: >200
 # Patch201: name.patch
@@ -423,6 +425,9 @@ run_all_tests
 %license pyagentx_LICENSE.txt
 
 %changelog
+* Mon Dec 12 2022 Mamoru TASAKA <mtasaka@fedoraproject.org> - 0.11.3-5
+- Backport upstream patch for rubygem-json 2.6.3 error message format change
+
 * Wed Sep 07 2022 Miroslav Lisik <mlisik@redhat.com> - 0.11.3-4
 - Fixed ruby socket permissions
 - Resolves: rhbz#2123389