diff --git a/Dockerfile b/Dockerfile
index b589105..499b819 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM gradle:4.7.0-jdk8-alpine AS build
+FROM gradle:7.1-jdk11 AS build
 COPY --chown=gradle:gradle *.gradle /home/gradle/src/
 COPY --chown=gradle:gradle ./external/ /home/gradle/src/external/
 COPY --chown=gradle:gradle ./src/ /home/gradle/src/src/
@@ -8,7 +8,7 @@ RUN gradle allJars --no-daemon
 RUN ls -l /home/gradle/src/*
 RUN ls -l /home/gradle/src/build/libs/*
 
-FROM openjdk:8-jre-slim
+FROM openjdk:11-jre-slim
 
 RUN mkdir /app
 
diff --git a/build-docker.sh b/build-docker.sh
new file mode 100755
index 0000000..5e22e2c
--- /dev/null
+++ b/build-docker.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+set -e
+set -x
+
+docker build --tag shst-builder .
diff --git a/build-local.sh b/build-local.sh
new file mode 100755
index 0000000..fbdf8c4
--- /dev/null
+++ b/build-local.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -e
+set -x
+
+/opt/homebrew/opt/gradle@7/bin/gradle allJars --stacktrace
diff --git a/build.gradle b/build.gradle
index 67e422c..b2c6e34 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,10 +3,13 @@ version '0.3.2'
 
 
 buildscript {
-    repositories {  jcenter()
-                    mavenCentral()}
+    repositories {
+            maven { url "https://plugins.gradle.org/m2/" }
+            mavenCentral()
+    }
     dependencies {
-        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.1'
+        //classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.1'
+        classpath 'gradle.plugin.com.github.johnrengelman:shadow:7.1.1'
         //classpath 'com.google.protobuf:protobuf-gradle-plugin:0.8.3'
     } //  Note PF : this plugin does not support resource transformation (needed for akka configuration files
 }
@@ -23,34 +26,34 @@ import com.github.jengelman.gradle.plugins.shadow.tasks.*
 sourceCompatibility = 1.8
 
 repositories {
-    maven { url "http://repository.apache.org" }
-    jcenter()
+    maven { url "https://repository.apache.org" }
+    mavenCentral()
     mavenLocal()
 }
 
 
 dependencies {
-    testCompile group: 'junit', name: 'junit', version: '4.11'
+    testImplementation group: 'junit', name: 'junit', version: '4.11'
 }
 
-def flinkversion = "1.3.2"
+def flinkversion = "1.3.3"
 def protobufversion = "3.4.0"
 
 dependencies {
 
 
-    compile 'org.slf4j:slf4j-api:2.0.3'
-    compile 'org.slf4j:slf4j-jdk14:2.0.3'
-    compile files('external/osmosis-osm-binary.jar')
-    compile 'com.esri.geometry:esri-geometry-api:1.2.1'
-    compile "org.apache.flink:flink-java:${flinkversion}"
-    compile "org.apache.flink:flink-clients_2.10:${flinkversion}"
-    compile "com.google.protobuf:protobuf-java:${protobufversion}"
-    compile "com.jsoniter:jsoniter:0.9.15"
-    compile 'net.sf.geographiclib:GeographicLib-Java:1.46'
-    compile 'commons-cli:commons-cli:1.4'
+    implementation 'org.slf4j:slf4j-api:2.0.3'
+    implementation 'org.slf4j:slf4j-jdk14:2.0.3'
+    implementation files('external/osmosis-osm-binary.jar')
+    implementation 'com.esri.geometry:esri-geometry-api:1.2.1'
+    implementation "org.apache.flink:flink-java:${flinkversion}"
+    implementation "org.apache.flink:flink-clients_2.10:${flinkversion}"
+    implementation "com.google.protobuf:protobuf-java:${protobufversion}"
+    implementation "com.jsoniter:jsoniter:0.9.15"
+    implementation 'net.sf.geographiclib:GeographicLib-Java:1.46'
+    implementation 'commons-cli:commons-cli:1.4'
 
-    testCompile "junit:junit:4.11"
+    testImplementation "junit:junit:4.11"
 }
 
 
@@ -115,7 +118,7 @@ shadowJar {
 // and permit to use the soft from a command line
 task allJars(type: ShadowJar) {
     from sourceSets.main.output
-    configurations = [project.configurations.compile]
+    configurations = [project.configurations.runtimeClasspath]
     transform(com.github.jengelman.gradle.plugins.shadow.transformers.AppendingTransformer) { resource = 'reference.conf' }
 
     manifest {
diff --git a/generate-tiles-docker.sh b/generate-tiles-docker.sh
new file mode 100755
index 0000000..97ccaf1
--- /dev/null
+++ b/generate-tiles-docker.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -e
+set -x
+
+docker run --rm \
+    -v $(pwd)/data:/data \
+    -v $(pwd)/out:/out \
+    shst-builder \
+    2G greater-london-latest.osm.pbf
diff --git a/generate-tiles-local.sh b/generate-tiles-local.sh
new file mode 100755
index 0000000..445b838
--- /dev/null
+++ b/generate-tiles-local.sh
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+set -e
+set -x
+
+# Usage: ./generate-tiles-local.sh [osmPbf] [xmx] [javabin] [jarfile]
+osmPbf=${1:-greater-london-latest.osm.pbf}
+xmx=${2:-2G}
+javabin=${3:-/opt/homebrew/opt/openjdk@11/bin/java}
+jarfile=${4:-build/libs/sharedstreets-builder-0.3.2.jar}
+
+
+pbfName=$(basename $osmPbf .osm.pbf)
+
+# Download OSM PBF
+# wget https://download.geofabrik.de/europe/united-kingdom/england/greater-london-latest.osm.pbf -O data/greater-london-latest.osm.pbf
+
+${javabin} -Xmx${xmx} -jar ${jarfile} --input data/${osmPbf} --output out/shst/tiles/osm/latest/${pbfName}
diff --git a/src/main/java/io/sharedstreets/tools/builder/ProcessPBF.java b/src/main/java/io/sharedstreets/tools/builder/ProcessPBF.java
index 8a47a8d..7b5ba48 100644
--- a/src/main/java/io/sharedstreets/tools/builder/ProcessPBF.java
+++ b/src/main/java/io/sharedstreets/tools/builder/ProcessPBF.java
@@ -125,7 +125,7 @@ public static void main(String[] args) throws Exception {
         conf.setFloat(ConfigConstants.TASK_MANAGER_MEMORY_FRACTION_KEY, 0.5f);
         final ExecutionEnvironment env = ExecutionEnvironment.createLocalEnvironment(conf);
         ExecutionConfig execConfig = env.getConfig();
-        execConfig.setParallelism(54);
+        //execConfig.setParallelism(54);
 
         // load osm data from PBF input
         OSMDataStream dataStream = new OSMDataStream(inputFile, env);