diff --git a/Dockerfile-alpine.template b/Dockerfile-alpine.template
index d53d61e..9135dc1 100644
--- a/Dockerfile-alpine.template
+++ b/Dockerfile-alpine.template
@@ -63,11 +63,11 @@ VOLUME /var/www/html
 
 # Define Joomla version and expected SHA1 signature
 ENV JOOMLA_VERSION %%VERSION%%
-ENV JOOMLA_SHA1 %%SHA1%%
+ENV JOOMLA_SHA512 %%SHA512%%
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/Dockerfile-debian.template b/Dockerfile-debian.template
index 85c6446..726b979 100644
--- a/Dockerfile-debian.template
+++ b/Dockerfile-debian.template
@@ -63,13 +63,13 @@ RUN set -ex; \
 
 VOLUME /var/www/html
 
-# Define Joomla version and expected SHA1 signature
+# Define Joomla version and expected SHA512 signature
 ENV JOOMLA_VERSION %%VERSION%%
-ENV JOOMLA_SHA1 %%SHA1%%
+ENV JOOMLA_SHA512 %%SHA512%%
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.1/apache/Dockerfile b/php7.1/apache/Dockerfile
index 1be80fb..c9b3928 100644
--- a/php7.1/apache/Dockerfile
+++ b/php7.1/apache/Dockerfile
@@ -65,13 +65,13 @@ RUN set -ex; \
 
 VOLUME /var/www/html
 
-# Define Joomla version and expected SHA1 signature
+# Define Joomla version and expected SHA512 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.1/fpm-alpine/Dockerfile b/php7.1/fpm-alpine/Dockerfile
index f3a46ce..7e18fd8 100644
--- a/php7.1/fpm-alpine/Dockerfile
+++ b/php7.1/fpm-alpine/Dockerfile
@@ -62,11 +62,11 @@ VOLUME /var/www/html
 
 # Define Joomla version and expected SHA1 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.1/fpm/Dockerfile b/php7.1/fpm/Dockerfile
index fef854e..ba7ecda 100644
--- a/php7.1/fpm/Dockerfile
+++ b/php7.1/fpm/Dockerfile
@@ -62,13 +62,13 @@ RUN set -ex; \
 
 VOLUME /var/www/html
 
-# Define Joomla version and expected SHA1 signature
+# Define Joomla version and expected SHA512 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.2/apache/Dockerfile b/php7.2/apache/Dockerfile
index dcb62e1..1964dd0 100644
--- a/php7.2/apache/Dockerfile
+++ b/php7.2/apache/Dockerfile
@@ -63,13 +63,13 @@ RUN set -ex; \
 
 VOLUME /var/www/html
 
-# Define Joomla version and expected SHA1 signature
+# Define Joomla version and expected SHA512 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.2/fpm-alpine/Dockerfile b/php7.2/fpm-alpine/Dockerfile
index 00e3cd3..6c6e158 100644
--- a/php7.2/fpm-alpine/Dockerfile
+++ b/php7.2/fpm-alpine/Dockerfile
@@ -60,11 +60,11 @@ VOLUME /var/www/html
 
 # Define Joomla version and expected SHA1 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.2/fpm/Dockerfile b/php7.2/fpm/Dockerfile
index f7b0515..20587b6 100644
--- a/php7.2/fpm/Dockerfile
+++ b/php7.2/fpm/Dockerfile
@@ -60,13 +60,13 @@ RUN set -ex; \
 
 VOLUME /var/www/html
 
-# Define Joomla version and expected SHA1 signature
+# Define Joomla version and expected SHA512 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.3/apache/Dockerfile b/php7.3/apache/Dockerfile
index b30c084..b57aea2 100644
--- a/php7.3/apache/Dockerfile
+++ b/php7.3/apache/Dockerfile
@@ -64,13 +64,13 @@ RUN set -ex; \
 
 VOLUME /var/www/html
 
-# Define Joomla version and expected SHA1 signature
+# Define Joomla version and expected SHA512 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.3/fpm-alpine/Dockerfile b/php7.3/fpm-alpine/Dockerfile
index cf1700d..d38f49e 100644
--- a/php7.3/fpm-alpine/Dockerfile
+++ b/php7.3/fpm-alpine/Dockerfile
@@ -61,11 +61,11 @@ VOLUME /var/www/html
 
 # Define Joomla version and expected SHA1 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/php7.3/fpm/Dockerfile b/php7.3/fpm/Dockerfile
index 43af0f7..1af4e9a 100644
--- a/php7.3/fpm/Dockerfile
+++ b/php7.3/fpm/Dockerfile
@@ -61,13 +61,13 @@ RUN set -ex; \
 
 VOLUME /var/www/html
 
-# Define Joomla version and expected SHA1 signature
+# Define Joomla version and expected SHA512 signature
 ENV JOOMLA_VERSION 3.9.1
-ENV JOOMLA_SHA1 aec0f602f93064d55cc06917329abdeef2e0f820
+ENV JOOMLA_SHA512 1a3b8d9788f657a97dc107bdea909792ba117c17587aaf05ce0f416bc1fddaf80c108431d6b9b1f1a212d10817cfe8f06c6178c474a4be1d73d232f98eb685e9
 
 # Download package and extract to web volume
 RUN curl -o joomla.tar.bz2 -SL https://github.com/joomla/joomla-cms/releases/download/${JOOMLA_VERSION}/Joomla_${JOOMLA_VERSION}-Stable-Full_Package.tar.bz2 \
-	&& echo "$JOOMLA_SHA1 *joomla.tar.bz2" | sha1sum -c - \
+	&& echo "$JOOMLA_SHA512 *joomla.tar.bz2" | sha512sum -c - \
 	&& mkdir /usr/src/joomla \
 	&& tar -xf joomla.tar.bz2 -C /usr/src/joomla \
 	&& rm joomla.tar.bz2 \
diff --git a/update.sh b/update.sh
index 43b1948..9b0b620 100755
--- a/update.sh
+++ b/update.sh
@@ -11,7 +11,7 @@ phpVersions=( "${phpVersions[@]%/}" )
 
 current="$(curl -fsSL 'https://downloads.joomla.org/api/v1/latest/cms' | jq -r '.branches[3].version')"
 urlVersion=$(echo $current | sed -e 's/\./-/g')
-sha1="$(curl -fsSL "https://downloads.joomla.org/api/v1/signatures/cms/$urlVersion"  | jq -r --arg file "Joomla_${current}-Stable-Full_Package.tar.bz2" '.[] | .[] | select(.filename == $file).sha1')"
+sha512="$(curl -fsSL "https://downloads.joomla.org/api/v1/signatures/cms/$urlVersion"  | jq -r --arg file "Joomla_${current}-Stable-Full_Package.tar.bz2" '.[] | .[] | select(.filename == $file).sha512')"
 
 declare -A variantExtras=(
 	[apache]='\n# Enable Apache Rewrite Module\nRUN a2enmod rewrite\n'
@@ -55,7 +55,7 @@ for phpVersion in "${phpVersions[@]}"; do
 
 			sed -r \
 				-e 's!%%VERSION%%!'"$current"'!g' \
-				-e 's!%%SHA1%%!'"$sha1"'!g' \
+				-e 's!%%SHA512%%!'"$sha512"'!g' \
 				-e 's!%%PHP_VERSION%%!'"$phpVersion"'!g' \
 				-e 's!%%VARIANT%%!'"$variant"'!g' \
 				-e 's!%%VARIANT_EXTRAS%%!'"$extras"'!g' \