diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f5d636c..d4db5a8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,10 +42,16 @@ jobs:
         uses: actions/checkout@v2
       - name: Package and ship
         run: |
+          curl -sSLO http://archive.ubuntu.com/ubuntu/pool/universe/libz/libzstd/zstd_1.4.4+dfsg-3_amd64.deb
+          sudo DEBIAN_FRONTEND=noninteractive dpkg -i --force-conflicts zstd_1.4.4+dfsg-3_amd64.deb
+          zstd -V
           for v in 5.3 5.4 5.5; do
-            sudo XZ_OPT=-e9 tar cfJ php-$v.tar.xz php-$v
+            sudo XZ_OPT=-0 tar cfJ php-$v.tar.xz php-$v
+            sudo tar cf - php-$v | zstd --fast=7 > php-$v.tar.zst
             curl --user "$BINTRAY_USER":"$BINTRAY_KEY" -X DELETE https://api.bintray.com/content/"$BINTRAY_USER"/"$BINTRAY_REPO"/php-$v.tar.xz || true
+            curl --user "$BINTRAY_USER":"$BINTRAY_KEY" -X DELETE https://api.bintray.com/content/"$BINTRAY_USER"/"$BINTRAY_REPO"/php-$v.tar.zst || true
             curl --user "$BINTRAY_USER":"$BINTRAY_KEY" -T php-$v.tar.xz https://api.bintray.com/content/shivammathur/php/"$v"-linux/"$v"/php-$v.tar.xz || true
+            curl --user "$BINTRAY_USER":"$BINTRAY_KEY" -T php-$v.tar.zst https://api.bintray.com/content/shivammathur/php/"$v"-linux/"$v"/php-$v.tar.zst || true
             curl --user "$BINTRAY_USER":"$BINTRAY_KEY" -X POST https://api.bintray.com/content/"$BINTRAY_USER"/"$BINTRAY_REPO"/"$v"-linux/"$v"/publish || true
           done
         env:
diff --git a/README.md b/README.md
index 5eb5c82..725744d 100644
--- a/README.md
+++ b/README.md
@@ -45,3 +45,4 @@ curl -sSL https://github.com/shivammathur/php5-ubuntu/releases/latest/download/i
 - [PhpRedis](https://github.com/phpredis/phpredis "Redis PHP extension")
 - [Xdebug](https://github.com/xdebug/xdebug "Xdebug PHP extension")
 - [Zend OPCache](https://github.com/zendtech/ZendOptimizerPlus "Zend OPCache extension")
+- [Zstandard](https://github.com/facebook/zstd "Zstandard compression algorithm")
diff --git a/php-5.3/install.sh b/php-5.3/install.sh
index f9164fb..fc4790f 100644
--- a/php-5.3/install.sh
+++ b/php-5.3/install.sh
@@ -1,5 +1,5 @@
 dpkg_install="sudo DEBIAN_FRONTEND=noninteractive dpkg -i --force-conflicts"
 sudo mkdir -p /var/run /run/php ~/php
 $dpkg_install ./deps/*.deb
-sudo tar xJf ./php-5.3.29.tar.xz -C ~/php
+sudo tar -I zstd -xf ./php-5.3.29.tar.zst -C ~/php
 sudo ln -sf ~/php/5.3.29/etc/php.ini /etc/php.ini
\ No newline at end of file
diff --git a/php-5.3/php-5.3.29.tar.xz b/php-5.3/php-5.3.29.tar.xz
deleted file mode 100644
index 95d16e0..0000000
Binary files a/php-5.3/php-5.3.29.tar.xz and /dev/null differ
diff --git a/php-5.3/php-5.3.29.tar.zst b/php-5.3/php-5.3.29.tar.zst
new file mode 100644
index 0000000..3f5fdac
Binary files /dev/null and b/php-5.3/php-5.3.29.tar.zst differ
diff --git a/php-5.4/post-install.sh b/php-5.4/post-install.sh
index f0818b5..3f2361b 100644
--- a/php-5.4/post-install.sh
+++ b/php-5.4/post-install.sh
@@ -18,4 +18,4 @@ sudo php5enmod redis
 sudo php5enmod xdebug
 echo "deb $dotdeb wheezy all" | sudo tee /etc/apt/sources.list.d/dotdeb-ubuntu-php-"$(lsb_release -s -c)".list
 curl -sSLO https://www.dotdeb.org/dotdeb.gpg
-sudo apt-key add dotdeb.gpg
+sudo DEBIAN_FRONTEND=noninteractive apt-key add dotdeb.gpg
diff --git a/php-5.5/post-install.sh b/php-5.5/post-install.sh
index 951128a..fc46681 100644
--- a/php-5.5/post-install.sh
+++ b/php-5.5/post-install.sh
@@ -18,4 +18,4 @@ sudo php5enmod redis
 sudo php5enmod xdebug
 echo "deb $dotdeb wheezy-php55 all" | sudo tee /etc/apt/sources.list.d/dotdeb-ubuntu-php-"$(lsb_release -s -c)".list
 curl -sSLO https://www.dotdeb.org/dotdeb.gpg
-sudo apt-key add dotdeb.gpg
\ No newline at end of file
+sudo DEBIAN_FRONTEND=noninteractive apt-key add dotdeb.gpg
\ No newline at end of file