diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f59bb7..6efe4cb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 2.2
+
+* Switch to Debian Stretch base image.
+* Upgrade `oauth2_proxy` to v2.2.
+
 ## 2.1-2
 
 * Fix 500 Internal Error Internal Error when sending POST to Google
diff --git a/CODEOWNERS b/CODEOWNERS
new file mode 100644
index 0000000..c907cbc
--- /dev/null
+++ b/CODEOWNERS
@@ -0,0 +1 @@
+* @itskingori @tsu-shiuan @zacblazic
diff --git a/Dockerfile b/Dockerfile
index 973ae36..ac36e74 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,22 +1,21 @@
-FROM alpine:3.4
+FROM debian:stretch-slim
 
-ENV APP_PKGS="ca-certificates"
-ENV BUILD_PKGS="wget"
+ARG OAUTH2_PROXY_VERSION="2.2"
+ARG OAUTH2_PROXY_GOLANG_VERSION="1.8.1"
+ARG OAUTH2_PROXY_PKG_VERSION="2.2.0"
+ARG OAUTH2_PROXY_PKG="oauth2_proxy-${OAUTH2_PROXY_PKG_VERSION}.linux-amd64.go${OAUTH2_PROXY_GOLANG_VERSION}"
+ARG OAUTH2_PROXY_SHA="1c16698ed0c85aa47aeb80e608f723835d9d1a8b98bd9ae36a514826b3acce56"
 
-ENV OAUTH2_PROXY_VERSION="2.1"
-ENV OAUTH2_PROXY_PKG="oauth2_proxy-${OAUTH2_PROXY_VERSION}.linux-amd64.go1.6" \
-    OAUTH2_PROXY_SHA="3061e5b04bd14eeb9ec0ad1c9b324ba8d99d50eaadc5f528cdf4d21043828298"
-RUN apk update && \
-    apk upgrade && \
-    apk add $APP_PKGS $BUILD_PKGS && \
+RUN apt-get update -y && \
+    apt-get install --no-install-recommends -y \
+      ca-certificates wget && \
     mkdir -p /var/tmp/oauth2_proxy && \
     cd /var/tmp/oauth2_proxy && \
     wget --progress=dot:mega https://github.com/bitly/oauth2_proxy/releases/download/v${OAUTH2_PROXY_VERSION}/${OAUTH2_PROXY_PKG}.tar.gz && \
     echo "${OAUTH2_PROXY_SHA} *${OAUTH2_PROXY_PKG}.tar.gz" | sha256sum -c - && \
     tar xvf ${OAUTH2_PROXY_PKG}.tar.gz && \
     cp /var/tmp/oauth2_proxy/${OAUTH2_PROXY_PKG}/oauth2_proxy /bin/ && \
-    apk del $BUILD_PKGS && \
-    rm -rf /var/cache/apk/*
+    rm -rf /tmp/* /var/{cache,log,tmp} /var/lib/{apt,dpkg,cache,log}
 
 EXPOSE 4180