diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index 3981717a..e550c79f 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -29,36 +29,21 @@ RUN set -ex; \
     apk del .build-deps
 
 # Calculate download URL
-ENV VERSION 4.9.0.1
-ENV URL https://files.phpmyadmin.net/phpMyAdmin/${VERSION}/phpMyAdmin-${VERSION}-all-languages.tar.xz
+ENV VERSION 4.9+snapshot
+ENV URL https://files.phpmyadmin.net/snapshots/phpMyAdmin-${VERSION}-all-languages.tar.xz
 LABEL version=$VERSION
 
-# Download tarball, verify it using gpg and extract
+# Download tarball and extract
 RUN set -ex; \
-    apk add --no-cache --virtual .fetch-deps \
-        gnupg \
-    ; \
-    \
-    export GNUPGHOME="$(mktemp -d)"; \
-    export GPGKEY="3D06A59ECE730EB71B511C17CE752F178259BD92"; \
     curl --output phpMyAdmin.tar.xz --location $URL; \
-    curl --output phpMyAdmin.tar.xz.asc --location $URL.asc; \
-    gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver ipv4.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keys.gnupg.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver pgp.mit.edu --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keyserver.pgp.com --recv-keys "$GPGKEY"; \
-    gpg --batch --verify phpMyAdmin.tar.xz.asc phpMyAdmin.tar.xz; \
     tar -xf phpMyAdmin.tar.xz -C /usr/src; \
-    gpgconf --kill all; \
-    rm -r "$GNUPGHOME" phpMyAdmin.tar.xz phpMyAdmin.tar.xz.asc; \
+    rm -r phpMyAdmin.tar.xz; \
     mv /usr/src/phpMyAdmin-$VERSION-all-languages /usr/src/phpmyadmin; \
     rm -rf /usr/src/phpmyadmin/setup/ /usr/src/phpmyadmin/examples/ /usr/src/phpmyadmin/test/ /usr/src/phpmyadmin/po/ /usr/src/phpmyadmin/composer.json /usr/src/phpmyadmin/RELEASE-DATE-$VERSION; \
     sed -i "s@define('CONFIG_DIR'.*@define('CONFIG_DIR', '/etc/phpmyadmin/');@" /usr/src/phpmyadmin/libraries/vendor_config.php; \
 # Add directory for sessions to allow session persistence
     mkdir /sessions; \
-    mkdir -p /var/nginx/client_body_temp; \
-    apk del .fetch-deps
+    mkdir -p /var/nginx/client_body_temp
 
 # Copy configuration
 COPY config.inc.php /etc/phpmyadmin/config.inc.php
diff --git a/Dockerfile-debian.template b/Dockerfile-debian.template
index 6bf93d6c..0cb6ede0 100644
--- a/Dockerfile-debian.template
+++ b/Dockerfile-debian.template
@@ -32,41 +32,21 @@ RUN set -ex; \
 	rm -rf /var/lib/apt/lists/*
 
 # Calculate download URL
-ENV VERSION 4.9.0.1
-ENV URL https://files.phpmyadmin.net/phpMyAdmin/${VERSION}/phpMyAdmin-${VERSION}-all-languages.tar.xz
+ENV VERSION 4.9+snapshot
+ENV URL https://files.phpmyadmin.net/snapshots/phpMyAdmin-${VERSION}-all-languages.tar.xz
 LABEL version=$VERSION
 
-# Download tarball, verify it using gpg and extract
+# Download tarball and extract
 RUN set -ex; \
-    fetchDeps=" \
-        gnupg \
-        dirmngr \
-    "; \
-    apt-get update; \
-    apt-get install -y --no-install-recommends $fetchDeps; \
-    \
-    export GNUPGHOME="$(mktemp -d)"; \
-    export GPGKEY="3D06A59ECE730EB71B511C17CE752F178259BD92"; \
     curl --output phpMyAdmin.tar.xz --location $URL; \
-    curl --output phpMyAdmin.tar.xz.asc --location $URL.asc; \
-    gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver ipv4.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keys.gnupg.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver pgp.mit.edu --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keyserver.pgp.com --recv-keys "$GPGKEY"; \
-    gpg --batch --verify phpMyAdmin.tar.xz.asc phpMyAdmin.tar.xz; \
     tar -xf phpMyAdmin.tar.xz -C /usr/src; \
-    gpgconf --kill all; \
-    rm -r "$GNUPGHOME" phpMyAdmin.tar.xz phpMyAdmin.tar.xz.asc; \
+    rm -r phpMyAdmin.tar.xz; \
     mv /usr/src/phpMyAdmin-$VERSION-all-languages /usr/src/phpmyadmin; \
     rm -rf /usr/src/phpmyadmin/setup/ /usr/src/phpmyadmin/examples/ /usr/src/phpmyadmin/test/ /usr/src/phpmyadmin/po/ /usr/src/phpmyadmin/composer.json /usr/src/phpmyadmin/RELEASE-DATE-$VERSION; \
     sed -i "s@define('CONFIG_DIR'.*@define('CONFIG_DIR', '/etc/phpmyadmin/');@" /usr/src/phpmyadmin/libraries/vendor_config.php; \
 # Add directory for sessions to allow session persistence
     mkdir /sessions; \
-    mkdir -p /var/nginx/client_body_temp; \
-    \
-    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $fetchDeps; \
-    rm -rf /var/lib/apt/lists/*
+    mkdir -p /var/nginx/client_body_temp
 
 # Copy configuration
 COPY config.inc.php /etc/phpmyadmin/config.inc.php
diff --git a/apache/Dockerfile b/apache/Dockerfile
index 8419655b..092ac67f 100644
--- a/apache/Dockerfile
+++ b/apache/Dockerfile
@@ -32,41 +32,21 @@ RUN set -ex; \
 	rm -rf /var/lib/apt/lists/*
 
 # Calculate download URL
-ENV VERSION 4.9.0.1
-ENV URL https://files.phpmyadmin.net/phpMyAdmin/${VERSION}/phpMyAdmin-${VERSION}-all-languages.tar.xz
+ENV VERSION 4.9+snapshot
+ENV URL https://files.phpmyadmin.net/snapshots/phpMyAdmin-${VERSION}-all-languages.tar.xz
 LABEL version=$VERSION
 
-# Download tarball, verify it using gpg and extract
+# Download tarball and extract
 RUN set -ex; \
-    fetchDeps=" \
-        gnupg \
-        dirmngr \
-    "; \
-    apt-get update; \
-    apt-get install -y --no-install-recommends $fetchDeps; \
-    \
-    export GNUPGHOME="$(mktemp -d)"; \
-    export GPGKEY="3D06A59ECE730EB71B511C17CE752F178259BD92"; \
     curl --output phpMyAdmin.tar.xz --location $URL; \
-    curl --output phpMyAdmin.tar.xz.asc --location $URL.asc; \
-    gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver ipv4.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keys.gnupg.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver pgp.mit.edu --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keyserver.pgp.com --recv-keys "$GPGKEY"; \
-    gpg --batch --verify phpMyAdmin.tar.xz.asc phpMyAdmin.tar.xz; \
     tar -xf phpMyAdmin.tar.xz -C /usr/src; \
-    gpgconf --kill all; \
-    rm -r "$GNUPGHOME" phpMyAdmin.tar.xz phpMyAdmin.tar.xz.asc; \
+    rm -r phpMyAdmin.tar.xz; \
     mv /usr/src/phpMyAdmin-$VERSION-all-languages /usr/src/phpmyadmin; \
     rm -rf /usr/src/phpmyadmin/setup/ /usr/src/phpmyadmin/examples/ /usr/src/phpmyadmin/test/ /usr/src/phpmyadmin/po/ /usr/src/phpmyadmin/composer.json /usr/src/phpmyadmin/RELEASE-DATE-$VERSION; \
     sed -i "s@define('CONFIG_DIR'.*@define('CONFIG_DIR', '/etc/phpmyadmin/');@" /usr/src/phpmyadmin/libraries/vendor_config.php; \
 # Add directory for sessions to allow session persistence
     mkdir /sessions; \
-    mkdir -p /var/nginx/client_body_temp; \
-    \
-    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $fetchDeps; \
-    rm -rf /var/lib/apt/lists/*
+    mkdir -p /var/nginx/client_body_temp
 
 # Copy configuration
 COPY config.inc.php /etc/phpmyadmin/config.inc.php
diff --git a/fpm-alpine/Dockerfile b/fpm-alpine/Dockerfile
index e30a3702..1f047a8d 100644
--- a/fpm-alpine/Dockerfile
+++ b/fpm-alpine/Dockerfile
@@ -29,36 +29,21 @@ RUN set -ex; \
     apk del .build-deps
 
 # Calculate download URL
-ENV VERSION 4.9.0.1
-ENV URL https://files.phpmyadmin.net/phpMyAdmin/${VERSION}/phpMyAdmin-${VERSION}-all-languages.tar.xz
+ENV VERSION 4.9+snapshot
+ENV URL https://files.phpmyadmin.net/snapshots/phpMyAdmin-${VERSION}-all-languages.tar.xz
 LABEL version=$VERSION
 
-# Download tarball, verify it using gpg and extract
+# Download tarball and extract
 RUN set -ex; \
-    apk add --no-cache --virtual .fetch-deps \
-        gnupg \
-    ; \
-    \
-    export GNUPGHOME="$(mktemp -d)"; \
-    export GPGKEY="3D06A59ECE730EB71B511C17CE752F178259BD92"; \
     curl --output phpMyAdmin.tar.xz --location $URL; \
-    curl --output phpMyAdmin.tar.xz.asc --location $URL.asc; \
-    gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver ipv4.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keys.gnupg.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver pgp.mit.edu --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keyserver.pgp.com --recv-keys "$GPGKEY"; \
-    gpg --batch --verify phpMyAdmin.tar.xz.asc phpMyAdmin.tar.xz; \
     tar -xf phpMyAdmin.tar.xz -C /usr/src; \
-    gpgconf --kill all; \
-    rm -r "$GNUPGHOME" phpMyAdmin.tar.xz phpMyAdmin.tar.xz.asc; \
+    rm -r phpMyAdmin.tar.xz; \
     mv /usr/src/phpMyAdmin-$VERSION-all-languages /usr/src/phpmyadmin; \
     rm -rf /usr/src/phpmyadmin/setup/ /usr/src/phpmyadmin/examples/ /usr/src/phpmyadmin/test/ /usr/src/phpmyadmin/po/ /usr/src/phpmyadmin/composer.json /usr/src/phpmyadmin/RELEASE-DATE-$VERSION; \
     sed -i "s@define('CONFIG_DIR'.*@define('CONFIG_DIR', '/etc/phpmyadmin/');@" /usr/src/phpmyadmin/libraries/vendor_config.php; \
 # Add directory for sessions to allow session persistence
     mkdir /sessions; \
-    mkdir -p /var/nginx/client_body_temp; \
-    apk del .fetch-deps
+    mkdir -p /var/nginx/client_body_temp
 
 # Copy configuration
 COPY config.inc.php /etc/phpmyadmin/config.inc.php
diff --git a/fpm/Dockerfile b/fpm/Dockerfile
index e25e40db..47f4f721 100644
--- a/fpm/Dockerfile
+++ b/fpm/Dockerfile
@@ -32,41 +32,21 @@ RUN set -ex; \
 	rm -rf /var/lib/apt/lists/*
 
 # Calculate download URL
-ENV VERSION 4.9.0.1
-ENV URL https://files.phpmyadmin.net/phpMyAdmin/${VERSION}/phpMyAdmin-${VERSION}-all-languages.tar.xz
+ENV VERSION 4.9+snapshot
+ENV URL https://files.phpmyadmin.net/snapshots/phpMyAdmin-${VERSION}-all-languages.tar.xz
 LABEL version=$VERSION
 
-# Download tarball, verify it using gpg and extract
+# Download tarball and extract
 RUN set -ex; \
-    fetchDeps=" \
-        gnupg \
-        dirmngr \
-    "; \
-    apt-get update; \
-    apt-get install -y --no-install-recommends $fetchDeps; \
-    \
-    export GNUPGHOME="$(mktemp -d)"; \
-    export GPGKEY="3D06A59ECE730EB71B511C17CE752F178259BD92"; \
     curl --output phpMyAdmin.tar.xz --location $URL; \
-    curl --output phpMyAdmin.tar.xz.asc --location $URL.asc; \
-    gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver ipv4.pool.sks-keyservers.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keys.gnupg.net --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver pgp.mit.edu --recv-keys "$GPGKEY" \
-        || gpg --batch --keyserver keyserver.pgp.com --recv-keys "$GPGKEY"; \
-    gpg --batch --verify phpMyAdmin.tar.xz.asc phpMyAdmin.tar.xz; \
     tar -xf phpMyAdmin.tar.xz -C /usr/src; \
-    gpgconf --kill all; \
-    rm -r "$GNUPGHOME" phpMyAdmin.tar.xz phpMyAdmin.tar.xz.asc; \
+    rm -r phpMyAdmin.tar.xz; \
     mv /usr/src/phpMyAdmin-$VERSION-all-languages /usr/src/phpmyadmin; \
     rm -rf /usr/src/phpmyadmin/setup/ /usr/src/phpmyadmin/examples/ /usr/src/phpmyadmin/test/ /usr/src/phpmyadmin/po/ /usr/src/phpmyadmin/composer.json /usr/src/phpmyadmin/RELEASE-DATE-$VERSION; \
     sed -i "s@define('CONFIG_DIR'.*@define('CONFIG_DIR', '/etc/phpmyadmin/');@" /usr/src/phpmyadmin/libraries/vendor_config.php; \
 # Add directory for sessions to allow session persistence
     mkdir /sessions; \
-    mkdir -p /var/nginx/client_body_temp; \
-    \
-    apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $fetchDeps; \
-    rm -rf /var/lib/apt/lists/*
+    mkdir -p /var/nginx/client_body_temp
 
 # Copy configuration
 COPY config.inc.php /etc/phpmyadmin/config.inc.php