diff --git a/.gitignore b/.gitignore
index 9ed7b6d..ce87882 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
-SOURCES/mysql2-0.5.3-tests.txz
-SOURCES/mysql2-0.5.3.gem
+SOURCES/mysql2-0.5.5-tests.txz
+SOURCES/mysql2-0.5.5.gem
diff --git a/.rubygem-mysql2.metadata b/.rubygem-mysql2.metadata
index 7dec311..ba8014a 100644
--- a/.rubygem-mysql2.metadata
+++ b/.rubygem-mysql2.metadata
@@ -1,2 +1,2 @@
-efae18a40b17065bff7f04732e8165d64393531c SOURCES/mysql2-0.5.3-tests.txz
-75e6935c4d9a2b1c047d9e9b69c4c6d4c7e0faef SOURCES/mysql2-0.5.3.gem
+e1f5106dda376545c654f64f0ea7b8609f03a220 SOURCES/mysql2-0.5.5-tests.txz
+40bb98b39e2d8f3521c6a4350a66a3c0ac9e2dd9 SOURCES/mysql2-0.5.5.gem
diff --git a/SOURCES/rubygem-mysql2-0.5.4-use-ssl-pem-files-in-repo.patch b/SOURCES/rubygem-mysql2-0.5.4-use-ssl-pem-files-in-repo.patch
new file mode 100644
index 0000000..67f41dd
--- /dev/null
+++ b/SOURCES/rubygem-mysql2-0.5.4-use-ssl-pem-files-in-repo.patch
@@ -0,0 +1,29 @@
+From 06512d47dc1491bf5686b2bd89a8555de9f2acc9 Mon Sep 17 00:00:00 2001
+From: Jun Aruga <jaruga@redhat.com>
+Date: Thu, 22 Dec 2022 16:14:39 +0100
+Subject: [PATCH] Use the SSL pem files in the Git repository.
+
+---
+ spec/mysql2/client_spec.rb | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/spec/mysql2/client_spec.rb b/spec/mysql2/client_spec.rb
+index 5861882..3f5cda8 100644
+--- a/spec/mysql2/client_spec.rb
++++ b/spec/mysql2/client_spec.rb
+@@ -154,9 +154,9 @@ RSpec.describe Mysql2::Client do # rubocop:disable Metrics/BlockLength
+     let(:option_overrides) do
+       {
+         'host'     => 'mysql2gem.example.com', # must match the certificates
+-        :sslkey    => '/etc/mysql/client-key.pem',
+-        :sslcert   => '/etc/mysql/client-cert.pem',
+-        :sslca     => '/etc/mysql/ca-cert.pem',
++        :sslkey    => 'spec/ssl/client-key.pem',
++        :sslcert   => 'spec/ssl/client-cert.pem',
++        :sslca     => 'spec/ssl/ca-cert.pem',
+         :sslcipher => 'DHE-RSA-AES256-SHA',
+         :sslverify => true,
+       }
+-- 
+2.38.1
+
diff --git a/SPECS/rubygem-mysql2.spec b/SPECS/rubygem-mysql2.spec
index 88cd46c..a8cf844 100644
--- a/SPECS/rubygem-mysql2.spec
+++ b/SPECS/rubygem-mysql2.spec
@@ -5,15 +5,18 @@
 %global gem_name mysql2
 
 Name: rubygem-%{gem_name}
-Version: 0.5.3
+Version: 0.5.5
 Release: 1%{?dist}
 Summary: A simple, fast Mysql library for Ruby, binding to libmysql
 License: MIT
 URL: https://github.com/brianmario/mysql2
 Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
 # git clone --no-checkout https://github.com/brianmario/mysql2.git
-# cd mysql2 && git archive -v -o mysql2-0.5.3-tests.txz 0.5.3 spec/
+# cd mysql2 && git archive -v -o mysql2-0.5.5-tests.txz 0.5.5 spec/
 Source1: %{gem_name}-%{version}-tests.txz
+# Use the SSL pem files in the upstream repositry for the SSL tests.
+# https://github.com/brianmario/mysql2/pull/1293
+Patch0: rubygem-mysql2-0.5.4-use-ssl-pem-files-in-repo.patch
 
 # Required in lib/mysql2.rb
 Requires: rubygem(bigdecimal)
@@ -32,6 +35,8 @@ BuildRequires: rubygem(bigdecimal)
 # Comment out to prevent a build error by conflicting requests.
 # Nothing provides libruby.so.2.4()(64bit) needed by rubygem-eventmachine.
 #BuildRequires: rubygem(eventmachine)
+# Used in spec/ssl/gen_certs.sh
+BuildRequires: %{_bindir}/openssl
 %endif
 
 %description
@@ -52,13 +57,12 @@ Documentation for %{name}
 %prep
 %setup -q -n %{gem_name}-%{version} -b 1
 
+pushd %{_builddir}/spec
+%patch -P 0 -p2
+popd
 
 %build
-# Create the gem as gem install only works on a gem file
 gem build ../%{gem_name}-%{version}.gemspec
-
-# %%gem_install compiles any C extensions and installs the gem into ./%%gem_dir
-# by default, so that we can move it into the buildroot in %%install
 %gem_install
 
 
@@ -67,8 +71,9 @@ mkdir -p %{buildroot}%{gem_dir}
 cp -pa .%{gem_dir}/* \
         %{buildroot}%{gem_dir}/
 
-mkdir -p %{buildroot}%{gem_extdir_mri}
-cp -a .%{gem_extdir_mri}/* %{buildroot}%{gem_extdir_mri}/
+mkdir -p %{buildroot}%{gem_extdir_mri}/%{gem_name}
+cp -a .%{gem_extdir_mri}/gem.build_complete %{buildroot}%{gem_extdir_mri}/
+cp -a .%{gem_extdir_mri}/%{gem_name}/*.so %{buildroot}%{gem_extdir_mri}/%{gem_name}
 
 # Prevent dangling symlink in -debuginfo.
 rm -rf %{buildroot}%{gem_instdir}/ext
@@ -81,6 +86,24 @@ pushd .%{gem_instdir}
 ln -s %{_builddir}/spec spec
 
 TOP_DIR=$(pwd)
+
+# Regenerate the SSL certification files from the localhost, as we cannot set
+# the host mysql2gem.example.com required for the SSL tests.
+# https://github.com/brianmario/mysql2/pull/1296
+sed -i '/host/ s/mysql2gem\.example\.com/localhost/' spec/mysql2/client_spec.rb
+sed -i '/commonName_default/ s/mysql2gem\.example\.com/localhost/' spec/ssl/gen_certs.sh
+pushd spec/ssl
+bash gen_certs.sh
+popd
+
+# See https://github.com/brianmario/mysql2/blob/master/ci/ssl.sh
+echo "
+[mysqld]
+ssl-ca=${TOP_DIR}/spec/ssl/ca-cert.pem
+ssl-cert=${TOP_DIR}/spec/ssl/server-cert.pem
+ssl-key=${TOP_DIR}/spec/ssl/server-key.pem
+" > ~/.my.cnf
+
 # Use testing port because the standard mysqld port 3306 is occupied.
 # Assign a random port to consider a case of multi builds in parallel in a host.
 # https://src.fedoraproject.org/rpms/rubygem-pg/pull-request/3
@@ -104,15 +127,22 @@ mysql_install_db \
   --port="${MYSQL_TEST_PORT}" \
   --ssl &
 
+conn_found=false
 for i in $(seq 10); do
+  echo "Waiting for the DB server to accept connections... ${i}"
   sleep 1
-  if grep -q 'ready for connections.' "${MYSQL_TEST_LOG}"; then
+  if grep -q 'ready for connections' "${MYSQL_TEST_LOG}"; then
+    conn_found=true
     break
   fi
-  echo "Waiting connections... ${i}"
 done
+if ! "${conn_found}"; then
+  echo "ERROR: Failed to connect the DB server."
+  cat "${MYSQL_TEST_LOG}"
+  exit 1
+fi
 
-# See https://github.com/brianmario/mysql2/blob/master/.travis_setup.sh
+# See https://github.com/brianmario/mysql2/blob/master/ci/setup.sh
 mysql -u root \
   -e 'CREATE DATABASE /*M!50701 IF NOT EXISTS */ test' \
   -S "${MYSQL_TEST_SOCKET}" \
@@ -137,17 +167,6 @@ user:
   socket: ${MYSQL_TEST_SOCKET}
 EOF
 
-# This test would require changes in host configuration.
-sed -i '/^  it "should be able to connect via SSL options" do$/,/^  end$/ s/^/#/' \
-  spec/mysql2/client_spec.rb
-
-# performance_schema.session_account_connect_attrs is unexpectedly empty.
-# https://github.com/brianmario/mysql2/issues/965
-sed -i '/^  it "should set default program_name in connect_attrs" do$/,/^  end$/ s/^/#/' \
-  spec/mysql2/client_spec.rb
-sed -i '/^  it "should set custom connect_attrs" do$/,/^  end$/ s/^/#/' \
-  spec/mysql2/client_spec.rb
-
 rspec -Ilib:%{buildroot}%{gem_extdir_mri} -f d spec
 popd
 
@@ -172,6 +191,17 @@ kill "$(cat "${MYSQL_TEST_PID_FILE}")"
 
 
 %changelog
+* Fri Jan 19 2024 Jarek Prokop <jprokop@redhat.com> - 0.5.5-1
+- Upgrade to mysql2 0.5.5.
+  Related: RHEL-17090
+
+* Fri Apr 22 2022 Jarek Prokop <jprokop@redhat.com> 0.5.3-2
+- Update by merging Fedora rawhide branch (commit: 81e2cc9)
+- Fix Mysql2::Result test for Ruby 3.1.
+- Remove gem_make.out and mkmf.log files from the binary RPM package.
+- Fix test assertion for mariadb-connector-c.
+  Related: rhbz#2063772
+
 * Fri May 29 2020 Jun Aruga <jaruga@redhat.com> - 0.5.3-1
 - New upstream release 0.5.3 by merging Fedora master branch (commit: 674d475)
   Resolves: rhbz#1817135