diff --git a/.travis.yml b/.travis.yml
index 87b8b6c2..ebdb074e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,16 +5,17 @@ services: docker
 dist: trusty
 
 env:
+  - VERSION=12.0beta2-3.0.0alpha3 VARIANT=alpine
+  - VERSION=11-2.5
+  - VERSION=11-2.5 VARIANT=alpine
+  - VERSION=10-2.5
+  - VERSION=10-2.5 VARIANT=alpine
   - VERSION=9.6-2.5
   - VERSION=9.6-2.5 VARIANT=alpine
   - VERSION=9.5-2.5
   - VERSION=9.5-2.5 VARIANT=alpine
   - VERSION=9.4-2.5
   - VERSION=9.4-2.5 VARIANT=alpine
-  - VERSION=11-2.5
-  - VERSION=11-2.5 VARIANT=alpine
-  - VERSION=10-2.5
-  - VERSION=10-2.5 VARIANT=alpine
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
diff --git a/10-2.5/alpine/Dockerfile b/10-2.5/alpine/Dockerfile
index ada31ce2..6151aa18 100644
--- a/10-2.5/alpine/Dockerfile
+++ b/10-2.5/alpine/Dockerfile
@@ -36,7 +36,7 @@ RUN set -ex \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         gdal-dev \
         geos-dev \
-        proj4-dev \
+        proj-dev \
         protobuf-c-dev \
     && cd /usr/src/postgis \
     && ./autogen.sh \
@@ -53,7 +53,7 @@ RUN set -ex \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \        
         geos \
         gdal \
-        proj4 \
+        proj \
         protobuf-c \
     && cd / \
     && rm -rf /usr/src/postgis \
diff --git a/11-2.5/alpine/Dockerfile b/11-2.5/alpine/Dockerfile
index 7fec69b5..e220eee8 100644
--- a/11-2.5/alpine/Dockerfile
+++ b/11-2.5/alpine/Dockerfile
@@ -32,11 +32,11 @@ RUN set -ex \
         perl \
     \
     && apk add --no-cache --virtual .build-deps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         gdal-dev \
         geos-dev \
-        proj4-dev \
+        proj-dev \
         protobuf-c-dev \
     && cd /usr/src/postgis \
     && ./autogen.sh \
@@ -49,11 +49,11 @@ RUN set -ex \
     && apk add --no-cache --virtual .postgis-rundeps \
         json-c \
     && apk add --no-cache --virtual .postgis-rundeps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \        
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         geos \
         gdal \
-        proj4 \
+        proj \
         protobuf-c \
     && cd / \
     && rm -rf /usr/src/postgis \
diff --git a/12.0beta2-3.0.0alpha3/alpine/Dockerfile b/12.0beta2-3.0.0alpha3/alpine/Dockerfile
new file mode 100644
index 00000000..2e34ac6a
--- /dev/null
+++ b/12.0beta2-3.0.0alpha3/alpine/Dockerfile
@@ -0,0 +1,62 @@
+FROM postgres:12-beta2-alpine
+
+ENV POSTGIS_VERSION 3.0.0alpha3
+ENV POSTGIS_SHA256 b75e28139fe74158a27b7e7b2d1c2c0a7acb3abe8c60cfc72d45b0827dd12364
+
+RUN set -ex \
+    \
+    && apk add --no-cache --virtual .fetch-deps \
+        ca-certificates \
+        openssl \
+        tar \
+    \
+    && wget -O postgis.tar.gz "https://github.com/postgis/postgis/archive/$POSTGIS_VERSION.tar.gz" \
+    && echo "$POSTGIS_SHA256 *postgis.tar.gz" | sha256sum -c - \
+    && mkdir -p /usr/src/postgis \
+    && tar \
+        --extract \
+        --file postgis.tar.gz \
+        --directory /usr/src/postgis \
+        --strip-components 1 \
+    && rm postgis.tar.gz \
+    \
+    && apk add --no-cache --virtual .build-deps \
+        autoconf \
+        automake \
+        g++ \
+        json-c-dev \
+        libtool \
+        libxml2-dev \
+        make \
+        perl \
+    \
+    && apk add --no-cache --virtual .build-deps-edge \
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
+        gdal-dev \
+        geos-dev \
+        proj-dev \
+        protobuf-c-dev \
+    && cd /usr/src/postgis \
+    && ./autogen.sh \
+# configure options taken from:
+# https://anonscm.debian.org/cgit/pkg-grass/postgis.git/tree/debian/rules?h=jessie
+    && ./configure \
+#       --with-gui \
+    && make \
+    && make install \
+    && apk add --no-cache --virtual .postgis-rundeps \
+        json-c \
+    && apk add --no-cache --virtual .postgis-rundeps-edge \
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \        
+        geos \
+        gdal \
+        proj \
+        protobuf-c \
+    && cd / \
+    && rm -rf /usr/src/postgis \
+    && apk del .fetch-deps .build-deps .build-deps-edge
+
+COPY ./initdb-postgis.sh /docker-entrypoint-initdb.d/postgis.sh
+COPY ./update-postgis.sh /usr/local/bin
diff --git a/12.0beta2-3.0.0alpha3/alpine/initdb-postgis.sh b/12.0beta2-3.0.0alpha3/alpine/initdb-postgis.sh
new file mode 100644
index 00000000..d6b2e08f
--- /dev/null
+++ b/12.0beta2-3.0.0alpha3/alpine/initdb-postgis.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+set -e
+
+# Perform all actions as $POSTGRES_USER
+export PGUSER="$POSTGRES_USER"
+
+# Create the 'template_postgis' template db
+"${psql[@]}" <<- 'EOSQL'
+CREATE DATABASE template_postgis;
+UPDATE pg_database SET datistemplate = TRUE WHERE datname = 'template_postgis';
+EOSQL
+
+# Load PostGIS into both template_database and $POSTGRES_DB
+for DB in template_postgis "$POSTGRES_DB"; do
+	echo "Loading PostGIS extensions into $DB"
+	"${psql[@]}" --dbname="$DB" <<-'EOSQL'
+		CREATE EXTENSION IF NOT EXISTS postgis;
+		CREATE EXTENSION IF NOT EXISTS postgis_raster;
+		CREATE EXTENSION IF NOT EXISTS postgis_topology;
+		CREATE EXTENSION IF NOT EXISTS fuzzystrmatch;
+		CREATE EXTENSION IF NOT EXISTS postgis_tiger_geocoder;
+EOSQL
+done
diff --git a/12.0beta2-3.0.0alpha3/alpine/update-postgis.sh b/12.0beta2-3.0.0alpha3/alpine/update-postgis.sh
new file mode 100644
index 00000000..f98abd26
--- /dev/null
+++ b/12.0beta2-3.0.0alpha3/alpine/update-postgis.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+set -e
+
+# Perform all actions as $POSTGRES_USER
+export PGUSER="$POSTGRES_USER"
+
+POSTGIS_VERSION="${POSTGIS_VERSION%%+*}"
+
+# Load PostGIS into both template_database and $POSTGRES_DB
+for DB in template_postgis "$POSTGRES_DB" "${@}"; do
+    echo "Updating PostGIS extensions '$DB' to $POSTGIS_VERSION"
+    psql --dbname="$DB" -c "
+        -- Upgrade PostGIS (includes raster)
+        CREATE EXTENSION IF NOT EXISTS postgis VERSION '$POSTGIS_VERSION';
+        ALTER EXTENSION postgis  UPDATE TO '$POSTGIS_VERSION';
+
+        -- Upgrade Topology
+        CREATE EXTENSION IF NOT EXISTS postgis_topology VERSION '$POSTGIS_VERSION';
+        ALTER EXTENSION postgis_topology UPDATE TO '$POSTGIS_VERSION';
+
+        -- Install Tiger dependencies in case not already installed
+        CREATE EXTENSION IF NOT EXISTS fuzzystrmatch;
+        -- Upgrade US Tiger Geocoder
+        CREATE EXTENSION IF NOT EXISTS postgis_tiger_geocoder VERSION '$POSTGIS_VERSION';
+        ALTER EXTENSION postgis_tiger_geocoder UPDATE TO '$POSTGIS_VERSION';
+    "
+done
diff --git a/9.4-2.5/alpine/Dockerfile b/9.4-2.5/alpine/Dockerfile
index 44f2b42d..02890981 100644
--- a/9.4-2.5/alpine/Dockerfile
+++ b/9.4-2.5/alpine/Dockerfile
@@ -32,11 +32,11 @@ RUN set -ex \
         perl \
     \
     && apk add --no-cache --virtual .build-deps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         gdal-dev \
         geos-dev \
-        proj4-dev \
+        proj-dev \
         protobuf-c-dev \
     && cd /usr/src/postgis \
     && ./autogen.sh \
@@ -49,11 +49,11 @@ RUN set -ex \
     && apk add --no-cache --virtual .postgis-rundeps \
         json-c \
     && apk add --no-cache --virtual .postgis-rundeps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \        
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         geos \
         gdal \
-        proj4 \
+        proj \
         protobuf-c \
     && cd / \
     && rm -rf /usr/src/postgis \
diff --git a/9.5-2.5/alpine/Dockerfile b/9.5-2.5/alpine/Dockerfile
index 21bf5184..35bdd133 100644
--- a/9.5-2.5/alpine/Dockerfile
+++ b/9.5-2.5/alpine/Dockerfile
@@ -36,7 +36,7 @@ RUN set -ex \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         gdal-dev \
         geos-dev \
-        proj4-dev \
+        proj-dev \
         protobuf-c-dev \
     && cd /usr/src/postgis \
     && ./autogen.sh \
@@ -53,7 +53,7 @@ RUN set -ex \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \        
         geos \
         gdal \
-        proj4 \
+        proj \
         protobuf-c \
     && cd / \
     && rm -rf /usr/src/postgis \
diff --git a/9.6-2.5/alpine/Dockerfile b/9.6-2.5/alpine/Dockerfile
index fda65829..347a7058 100644
--- a/9.6-2.5/alpine/Dockerfile
+++ b/9.6-2.5/alpine/Dockerfile
@@ -32,11 +32,11 @@ RUN set -ex \
         perl \
     \
     && apk add --no-cache --virtual .build-deps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         gdal-dev \
         geos-dev \
-        proj4-dev \
+        proj-dev \
         protobuf-c-dev \
     && cd /usr/src/postgis \
     && ./autogen.sh \
@@ -49,11 +49,11 @@ RUN set -ex \
     && apk add --no-cache --virtual .postgis-rundeps \
         json-c \
     && apk add --no-cache --virtual .postgis-rundeps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \        
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         geos \
         gdal \
-        proj4 \
+        proj \
         protobuf-c \
     && cd / \
     && rm -rf /usr/src/postgis \
diff --git a/Dockerfile.alpine.template b/Dockerfile.alpine.template
index d3e5f34f..213e7180 100644
--- a/Dockerfile.alpine.template
+++ b/Dockerfile.alpine.template
@@ -32,11 +32,11 @@ RUN set -ex \
         perl \
     \
     && apk add --no-cache --virtual .build-deps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
         --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         gdal-dev \
         geos-dev \
-        proj4-dev \
+        proj-dev \
         protobuf-c-dev \
     && cd /usr/src/postgis \
     && ./autogen.sh \
@@ -49,11 +49,11 @@ RUN set -ex \
     && apk add --no-cache --virtual .postgis-rundeps \
         json-c \
     && apk add --no-cache --virtual .postgis-rundeps-edge \
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \    
-        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \        
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+        --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
         geos \
         gdal \
-        proj4 \
+        proj \
         protobuf-c \
     && cd / \
     && rm -rf /usr/src/postgis \