diff --git a/.travis.yml b/.travis.yml
index 096979cca..bc09ca645 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,6 @@ env:
   - VERSION=8.0
   - VERSION=5.7
   - VERSION=5.6
-  - VERSION=5.5
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
diff --git a/5.5/Dockerfile b/5.5/Dockerfile
deleted file mode 100644
index f3f04d2ea..000000000
--- a/5.5/Dockerfile
+++ /dev/null
@@ -1,87 +0,0 @@
-FROM debian:stretch-slim
-
-# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
-RUN groupadd -r mysql && useradd -r -g mysql mysql
-
-RUN apt-get update && apt-get install -y --no-install-recommends gnupg dirmngr && rm -rf /var/lib/apt/lists/*
-
-# add gosu for easy step-down from root
-ENV GOSU_VERSION 1.7
-RUN set -x \
-	&& apt-get update && apt-get install -y --no-install-recommends ca-certificates wget && rm -rf /var/lib/apt/lists/* \
-	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
-	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
-	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
-	&& gpgconf --kill all \
-	&& rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc \
-	&& chmod +x /usr/local/bin/gosu \
-	&& gosu nobody true \
-	&& apt-get purge -y --auto-remove ca-certificates wget
-
-RUN mkdir /docker-entrypoint-initdb.d
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-# for MYSQL_RANDOM_ROOT_PASSWORD
-		pwgen \
-# FATAL ERROR: please install the following Perl modules before executing /usr/local/mysql/scripts/mysql_install_db:
-# File::Basename
-# File::Copy
-# Sys::Hostname
-# Data::Dumper
-		perl \
-# mysqld: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
-		libaio1 \
-# mysql: error while loading shared libraries: libncurses.so.5: cannot open shared object file: No such file or directory
-		libncurses5 \
-	&& rm -rf /var/lib/apt/lists/*
-
-ENV MYSQL_MAJOR 5.5
-ENV MYSQL_VERSION 5.5.62
-
-RUN apt-get update && apt-get install -y ca-certificates wget --no-install-recommends && rm -rf /var/lib/apt/lists/* \
-	&& wget "https://cdn.mysql.com/Downloads/MySQL-$MYSQL_MAJOR/mysql-$MYSQL_VERSION-linux-glibc2.12-x86_64.tar.gz" -O mysql.tar.gz \
-	&& wget "https://cdn.mysql.com/Downloads/MySQL-$MYSQL_MAJOR/mysql-$MYSQL_VERSION-linux-glibc2.12-x86_64.tar.gz.asc" -O mysql.tar.gz.asc \
-	&& apt-get purge -y --auto-remove ca-certificates wget \
-	&& export GNUPGHOME="$(mktemp -d)" \
-# gpg: key 5072E1F5: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5 \
-	&& gpg --batch --verify mysql.tar.gz.asc mysql.tar.gz \
-	&& gpgconf --kill all \
-	&& rm -rf "$GNUPGHOME" mysql.tar.gz.asc \
-	&& mkdir /usr/local/mysql \
-	&& tar -xzf mysql.tar.gz -C /usr/local/mysql --strip-components=1 \
-	&& rm mysql.tar.gz \
-	&& rm -rf /usr/local/mysql/mysql-test /usr/local/mysql/sql-bench \
-	&& rm -rf /usr/local/mysql/bin/*-debug /usr/local/mysql/bin/*_embedded \
-	&& find /usr/local/mysql -type f -name "*.a" -delete \
-	&& apt-get update && apt-get install -y binutils && rm -rf /var/lib/apt/lists/* \
-	&& { find /usr/local/mysql -type f -executable -exec strip --strip-all '{}' + || true; } \
-	&& apt-get purge -y --auto-remove binutils
-ENV PATH $PATH:/usr/local/mysql/bin:/usr/local/mysql/scripts
-
-# replicate some of the way the APT package configuration works
-# this is only for 5.5 since it doesn't have an APT repo, and will go away when 5.5 does
-RUN mkdir -p /etc/mysql/conf.d \
-	&& { \
-		echo '[mysqld]'; \
-		echo 'skip-host-cache'; \
-		echo 'skip-name-resolve'; \
-		echo 'datadir = /var/lib/mysql'; \
-		echo '!includedir /etc/mysql/conf.d/'; \
-	} > /etc/mysql/my.cnf
-
-RUN mkdir -p /var/lib/mysql /var/run/mysqld \
-	&& chown -R mysql:mysql /var/lib/mysql /var/run/mysqld \
-# ensure that /var/run/mysqld (used for socket and lock files) is writable regardless of the UID our mysqld instance ends up having at runtime
-	&& chmod 777 /var/run/mysqld
-
-VOLUME /var/lib/mysql
-
-COPY docker-entrypoint.sh /usr/local/bin/
-RUN ln -s usr/local/bin/docker-entrypoint.sh /entrypoint.sh # backwards compat
-ENTRYPOINT ["docker-entrypoint.sh"]
-
-EXPOSE 3306
-CMD ["mysqld"]
diff --git a/5.5/docker-entrypoint.sh b/5.5/docker-entrypoint.sh
deleted file mode 100755
index cd1855f3f..000000000
--- a/5.5/docker-entrypoint.sh
+++ /dev/null
@@ -1,210 +0,0 @@
-#!/bin/bash
-set -eo pipefail
-shopt -s nullglob
-
-# if command starts with an option, prepend mysqld
-if [ "${1:0:1}" = '-' ]; then
-	set -- mysqld "$@"
-fi
-
-# skip setup if they want an option that stops mysqld
-wantHelp=
-for arg; do
-	case "$arg" in
-		-'?'|--help|--print-defaults|-V|--version)
-			wantHelp=1
-			break
-			;;
-	esac
-done
-
-# usage: file_env VAR [DEFAULT]
-#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
-# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
-#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
-file_env() {
-	local var="$1"
-	local fileVar="${var}_FILE"
-	local def="${2:-}"
-	if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
-		echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
-		exit 1
-	fi
-	local val="$def"
-	if [ "${!var:-}" ]; then
-		val="${!var}"
-	elif [ "${!fileVar:-}" ]; then
-		val="$(< "${!fileVar}")"
-	fi
-	export "$var"="$val"
-	unset "$fileVar"
-}
-
-# usage: process_init_file FILENAME MYSQLCOMMAND...
-#    ie: process_init_file foo.sh mysql -uroot
-# (process a single initializer file, based on its extension. we define this
-# function here, so that initializer scripts (*.sh) can use the same logic,
-# potentially recursively, or override the logic used in subsequent calls)
-process_init_file() {
-	local f="$1"; shift
-	local mysql=( "$@" )
-
-	case "$f" in
-		*.sh)     echo "$0: running $f"; . "$f" ;;
-		*.sql)    echo "$0: running $f"; "${mysql[@]}" < "$f"; echo ;;
-		*.sql.gz) echo "$0: running $f"; gunzip -c "$f" | "${mysql[@]}"; echo ;;
-		*)        echo "$0: ignoring $f" ;;
-	esac
-	echo
-}
-
-_check_config() {
-	toRun=( "$@" --verbose --help --log-bin-index="$(mktemp -u)" )
-	if ! errors="$("${toRun[@]}" 2>&1 >/dev/null)"; then
-		cat >&2 <<-EOM
-
-			ERROR: mysqld failed while attempting to check config
-			command was: "${toRun[*]}"
-
-			$errors
-		EOM
-		exit 1
-	fi
-}
-
-# Fetch value from server config
-# We use mysqld --verbose --help instead of my_print_defaults because the
-# latter only show values present in config files, and not server defaults
-_get_config() {
-	local conf="$1"; shift
-	"$@" --verbose --help --log-bin-index="$(mktemp -u)" 2>/dev/null | awk '$1 == "'"$conf"'" { print $2; exit }'
-}
-
-# allow the container to be started with `--user`
-if [ "$1" = 'mysqld' -a -z "$wantHelp" -a "$(id -u)" = '0' ]; then
-	_check_config "$@"
-	DATADIR="$(_get_config 'datadir' "$@")"
-	mkdir -p "$DATADIR"
-	chown -R mysql:mysql "$DATADIR"
-	exec gosu mysql "$BASH_SOURCE" "$@"
-fi
-
-if [ "$1" = 'mysqld' -a -z "$wantHelp" ]; then
-	# still need to check config, container may have started with --user
-	_check_config "$@"
-	# Get config
-	DATADIR="$(_get_config 'datadir' "$@")"
-
-	if [ ! -d "$DATADIR/mysql" ]; then
-		file_env 'MYSQL_ROOT_PASSWORD'
-		if [ -z "$MYSQL_ROOT_PASSWORD" -a -z "$MYSQL_ALLOW_EMPTY_PASSWORD" -a -z "$MYSQL_RANDOM_ROOT_PASSWORD" ]; then
-			echo >&2 'error: database is uninitialized and password option is not specified '
-			echo >&2 '  You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD'
-			exit 1
-		fi
-
-		mkdir -p "$DATADIR"
-
-		echo 'Initializing database'
-		# "Other options are passed to mysqld." (so we pass all "mysqld" arguments directly here)
-		mysql_install_db --datadir="$DATADIR" --rpm --basedir=/usr/local/mysql "${@:2}"
-		echo 'Database initialized'
-
-		SOCKET="$(_get_config 'socket' "$@")"
-		"$@" --skip-networking --basedir=/usr/local/mysql --socket="${SOCKET}" &
-		pid="$!"
-
-		mysql=( mysql --protocol=socket -uroot -hlocalhost --socket="${SOCKET}" )
-
-		for i in {30..0}; do
-			if echo 'SELECT 1' | "${mysql[@]}" &> /dev/null; then
-				break
-			fi
-			echo 'MySQL init process in progress...'
-			sleep 1
-		done
-		if [ "$i" = 0 ]; then
-			echo >&2 'MySQL init process failed.'
-			exit 1
-		fi
-
-		if [ -z "$MYSQL_INITDB_SKIP_TZINFO" ]; then
-			# sed is for https://bugs.mysql.com/bug.php?id=20545
-			mysql_tzinfo_to_sql /usr/share/zoneinfo | sed 's/Local time zone must be set--see zic manual page/FCTY/' | "${mysql[@]}" mysql
-		fi
-
-		if [ ! -z "$MYSQL_RANDOM_ROOT_PASSWORD" ]; then
-			export MYSQL_ROOT_PASSWORD="$(pwgen -1 32)"
-			echo "GENERATED ROOT PASSWORD: $MYSQL_ROOT_PASSWORD"
-		fi
-
-		rootCreate=
-		# default root to listen for connections from anywhere
-		file_env 'MYSQL_ROOT_HOST' '%'
-		if [ ! -z "$MYSQL_ROOT_HOST" -a "$MYSQL_ROOT_HOST" != 'localhost' ]; then
-			# no, we don't care if read finds a terminating character in this heredoc
-			# https://unix.stackexchange.com/questions/265149/why-is-set-o-errexit-breaking-this-read-heredoc-expression/265151#265151
-			read -r -d '' rootCreate <<-EOSQL || true
-				CREATE USER 'root'@'${MYSQL_ROOT_HOST}' IDENTIFIED BY '${MYSQL_ROOT_PASSWORD}' ;
-				GRANT ALL ON *.* TO 'root'@'${MYSQL_ROOT_HOST}' WITH GRANT OPTION ;
-			EOSQL
-		fi
-
-		"${mysql[@]}" <<-EOSQL
-			-- What's done in this file shouldn't be replicated
-			--  or products like mysql-fabric won't work
-			SET @@SESSION.SQL_LOG_BIN=0;
-
-			DELETE FROM mysql.user WHERE user NOT IN ('mysql.sys', 'mysqlxsys', 'root') OR host NOT IN ('localhost') ;
-			SET PASSWORD FOR 'root'@'localhost'=PASSWORD('${MYSQL_ROOT_PASSWORD}') ;
-			GRANT ALL ON *.* TO 'root'@'localhost' WITH GRANT OPTION ;
-			${rootCreate}
-			DROP DATABASE IF EXISTS test ;
-			FLUSH PRIVILEGES ;
-		EOSQL
-
-		if [ ! -z "$MYSQL_ROOT_PASSWORD" ]; then
-			mysql+=( -p"${MYSQL_ROOT_PASSWORD}" )
-		fi
-
-		file_env 'MYSQL_DATABASE'
-		if [ "$MYSQL_DATABASE" ]; then
-			echo "CREATE DATABASE IF NOT EXISTS \`$MYSQL_DATABASE\` ;" | "${mysql[@]}"
-			mysql+=( "$MYSQL_DATABASE" )
-		fi
-
-		file_env 'MYSQL_USER'
-		file_env 'MYSQL_PASSWORD'
-		if [ "$MYSQL_USER" -a "$MYSQL_PASSWORD" ]; then
-			echo "CREATE USER '$MYSQL_USER'@'%' IDENTIFIED BY '$MYSQL_PASSWORD' ;" | "${mysql[@]}"
-
-			if [ "$MYSQL_DATABASE" ]; then
-				echo "GRANT ALL ON \`$MYSQL_DATABASE\`.* TO '$MYSQL_USER'@'%' ;" | "${mysql[@]}"
-			fi
-
-			echo 'FLUSH PRIVILEGES ;' | "${mysql[@]}"
-		fi
-
-		echo
-		ls /docker-entrypoint-initdb.d/ > /dev/null
-		for f in /docker-entrypoint-initdb.d/*; do
-			process_init_file "$f" "${mysql[@]}"
-		done
-
-		if [ ! -z "$MYSQL_ONETIME_PASSWORD" ]; then
-			echo >&2
-			echo >&2 'Sorry, this version of MySQL does not support "PASSWORD EXPIRE" (required for MYSQL_ONETIME_PASSWORD).'
-			echo >&2
-		fi
-		if ! kill -s TERM "$pid" || ! wait "$pid"; then
-			echo >&2 'MySQL init process failed.'
-			exit 1
-		fi
-
-		echo
-		echo 'MySQL init process done. Ready for start up.'
-		echo
-	fi
-fi
-
-exec "$@"
diff --git a/update.sh b/update.sh
index da85ee211..5b725e647 100755
--- a/update.sh
+++ b/update.sh
@@ -18,26 +18,19 @@ for version in "${versions[@]}"; do
 	debianVariant="${debianVariants[$version]:-$defaultDebianVariant}"
 	debianSuite="${debianVariant%%-*}" # "stretch", etc
 
-	if [ "$version" = '5.5' ]; then
-		fullVersion="$(curl -sSL "https://dev.mysql.com/downloads/mysql/$version.html?os=2" \
-			| grep '">(mysql-'"$version"'.*-linux.*-x86_64\.tar\.gz)<' \
-			| sed -r 's!.*\(mysql-([^<)]+)-linux.*-x86_64\.tar\.gz\).*!\1!' \
-			| sort -V | tail -1)"
-	else
-		fullVersion="$(
-			curl -fsSL "http://repo.mysql.com/apt/debian/dists/$debianSuite/mysql-$version/binary-amd64/Packages.gz" \
-				| gunzip \
-				| awk -F ': ' '
-					$1 == "Package" {
-						pkg = $2
-						next
-					}
-					pkg == "mysql-server" && $1 == "Version" {
-						print $2
-					}
-				'
-		)"
-	fi
+	fullVersion="$(
+		curl -fsSL "http://repo.mysql.com/apt/debian/dists/$debianSuite/mysql-$version/binary-amd64/Packages.gz" \
+			| gunzip \
+			| awk -F ': ' '
+				$1 == "Package" {
+					pkg = $2
+					next
+				}
+				pkg == "mysql-server" && $1 == "Version" {
+					print $2
+				}
+			'
+	)"
 
 	(
 		set -x