diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..36d2d2f
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,48 @@
+# Contributing to Docker Bench for Security
+
+Want to hack on Docker Bench? Awesome! Here are instructions to get you
+started.
+
+The Docker Bench for Security is a part of the [Docker](https://www.docker.com) project, and follows
+the same rules and principles. If you're already familiar with the way
+Docker does things, you'll feel right at home.
+
+Otherwise, go read
+[Docker's contributions guidelines](https://github.com/docker/docker/blob/master/CONTRIBUTING.md).
+
+### Development Environment Setup
+
+The only thing you need to hack on Docker Bench for Security is a POSIX 2004 compliant shell. We try to keep the project compliant for maximum portability
+
+#### Start hacking
+
+You can build the container that wraps the docker-bench for security:
+```sh
+✗ git clone git@github.com:docker/docker-bench-security.git
+✗ docker build -t diogomonica/docker-bench-security .
+```
+
+Or you can simply run the shell script locally:
+
+```sh
+✗ sh docker-bench-security.sh
+```
+
+The Docker Bench has the main script called `docker-bench-security.sh`. This is the main script that checks for all the dependencies, deals with command line arguments and loads all the tests.
+
+The tests are split in 6 different files:
+
+```sh
+✗  docker-bench-security git:(master) ✗ tree tests
+tests
+├── 1_host_configuration.sh
+├── 2_docker_daemon_configuration.sh
+├── 3_docker_daemon_configuration_files.sh
+├── 4_container_images.sh
+├── 5_container_runtime.sh
+└── 6_docker_security_operations.sh
+```
+
+To modify the Docker Bench for Security you should first clone the repository, make your changes, and then sign off on your commits. After that feel free to send us a pull-request with the changes.
+
+While this tool is inspired in the CIS Docker 1.6 Benchmark, feel free to add new tests. We will try to turn dockerbench.com into a list of good community benchmarks for both security and performance, and we would love community contributions.
diff --git a/Dockerfile b/Dockerfile
index 5b948bc..a552ef4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM gliderlabs/alpine:3.1
+FROM alpine:3.1
 
 RUN apk --update add docker
 
diff --git a/README.md b/README.md
index eb5e117..74de8e8 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ docker run -it --net host --pid host -v /var/lib:/var/lib \
 Also, this script can also be simply run from your base host by running:
 
 ```sh
-git clone https://github.com/diogomonica/docker-bench-security.git
+git clone https://github.com/docker/docker-bench-security.git
 cd docker-bench-security
 sh docker-bench-security.sh
 ```
diff --git a/docker-bench-security.sh b/docker-bench-security.sh
old mode 100644
new mode 100755
diff --git a/tests/2_docker_daemon_configuration.sh b/tests/2_docker_daemon_configuration.sh
index 8561f52..ed94926 100644
--- a/tests/2_docker_daemon_configuration.sh
+++ b/tests/2_docker_daemon_configuration.sh
@@ -5,7 +5,7 @@ info "2 - Docker Daemon Configuration"
 
 # 2.1
 check_2_1="2.1  - Do not use lxc execution driver"
-pgrep -U root -u root -lf docker | grep lxc >/dev/null 2>&1
+pgrep -lf docker | grep lxc >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   warn "$check_2_1"
 else
@@ -14,7 +14,7 @@ fi
 
 # 2.2
 check_2_2="2.2  - Restrict network traffic between containers"
-pgrep -U root -u root -lf docker | grep "icc=false" >/dev/null 2>&1
+pgrep -lf docker | grep "icc=false" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   pass "$check_2_2"
 else
@@ -23,7 +23,7 @@ fi
 
 # 2.3
 check_2_3="2.3  - Set the logging level"
-pgrep -U root -u root -lf docker | grep "log-level=\"debug\"" >/dev/null 2>&1
+pgrep -lf docker | grep "log-level=\"debug\"" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   warn "$check_2_3"
 else
@@ -32,7 +32,7 @@ fi
 
 # 2.4
 check_2_4="2.4  - Allow Docker to make changes to iptables"
-pgrep -U root -u root -lf docker | grep "iptables=false" >/dev/null 2>&1
+pgrep -lf docker | grep "iptables=false" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   warn "$check_2_4"
 else
@@ -41,7 +41,7 @@ fi
 
 # 2.5
 check_2_5="2.5  - Do not use insecure registries"
-pgrep -U root -u root -lf docker | grep "insecure-registry" >/dev/null 2>&1
+pgrep -lf docker | grep "insecure-registry" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   warn "$check_2_5"
 else
@@ -50,7 +50,7 @@ fi
 
 # 2.6
 check_2_6="2.6  - Setup a local registry mirror"
-pgrep -U root -u root -lf docker | grep "registry-mirror" >/dev/null 2>&1
+pgrep -lf docker | grep "registry-mirror" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   pass "$check_2_6"
 else
@@ -69,7 +69,7 @@ fi
 
 # 2.8
 check_2_8="2.8  - Do not bind Docker to another IP/Port or a Unix socket"
-pgrep -U root -u root -lf docker | grep "\-H" >/dev/null 2>&1
+pgrep -lf docker | grep "\-H" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   info "$check_2_8"
   info "     * Docker daemon running with -H"
@@ -79,9 +79,9 @@ fi
 
 # 2.9
 check_2_9="2.9  - Configure TLS authentication for Docker daemon"
-pgrep -U root -u root -lf docker | grep "tcp://" >/dev/null 2>&1
+pgrep -lf docker | grep "tcp://" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
-  pgrep -U root -u root -lf docker | grep "tlsverify" | grep "tlskey" >/dev/null 2>&1
+  pgrep -lf docker | grep "tlsverify" | grep "tlskey" >/dev/null 2>&1
   if [ $? -eq 0 ]; then
     pass "$check_2_9"
     info "     * Docker daemon currently listening on TCP"
@@ -96,7 +96,7 @@ fi
 
 # 2.10
 check_2_10="2.10 - Set default ulimit as appropriate"
-pgrep -U root -u root -lf docker | grep "default-ulimit" >/dev/null 2>&1
+pgrep -lf docker | grep "default-ulimit" >/dev/null 2>&1
 if [ $? -eq 0 ]; then
   pass "$check_2_10"
 else
diff --git a/tests/5_container_runtime.sh b/tests/5_container_runtime.sh
index 11e14df..35c41b5 100644
--- a/tests/5_container_runtime.sh
+++ b/tests/5_container_runtime.sh
@@ -201,18 +201,21 @@ else
 
   fail=0
   for c in $containers; do
-    port=$(docker port "$c" | awk '{print $1}' | cut -d '/' -f1)
+    ports=$(docker port "$c" | awk '{print $1}' | cut -d '/' -f1)
 
-    if [ ! -z "$port" ] && [ "$port" -lt 1025 ]; then
-      # If it's the first container, fail the test
-      if [ $fail -eq 0 ]; then
-        warn "$check_5_8"
-        warn "     * Privileged Port in use: $port in $c"
-        fail=1
-      else
-        warn "     * Privileged Port in use: $port in $c"
+    # iterate through port range (line delimited)
+    for port in $ports; do
+    if [ ! -z "$port" ] && [ "0$port" -lt 1025 ]; then
+        # If it's the first container, fail the test
+        if [ $fail -eq 0 ]; then
+          warn "$check_5_8"
+          warn "     * Privileged Port in use: $port in $c"
+          fail=1
+        else
+          warn "     * Privileged Port in use: $port in $c"
+        fi
       fi
-    fi
+    done
   done
   # We went through all the containers and found no privileged ports
   if [ $fail -eq 0 ]; then
@@ -316,17 +319,18 @@ else
 
   fail=0
   for c in $containers; do
-    ip=$(docker port "$c" | awk '{print $3}' | cut -d ':' -f1)
-    if [ "$ip" = "0.0.0.0" ]; then
-      # If it's the first container, fail the test
-      if [ $fail -eq 0 ]; then
-        warn "$check_5_14"
-        warn "     * Port being bound to wildcard IP: $ip in $c"
-        fail=1
-      else
-        warn "     * Port being bound to wildcard IP: $ip in $c"
+    for ip in $(docker port "$c" | awk '{print $3}' | cut -d ':' -f1); do
+      if [ "$ip" = "0.0.0.0" ]; then
+        # If it's the first container, fail the test
+        if [ $fail -eq 0 ]; then
+          warn "$check_5_14"
+          warn "     * Port being bound to wildcard IP: $ip in $c"
+          fail=1
+        else
+          warn "     * Port being bound to wildcard IP: $ip in $c"
+        fi
       fi
-    fi
+    done
   done
   # We went through all the containers and found no ports bound to 0.0.0.0
   if [ $fail -eq 0 ]; then
diff --git a/tests/6_docker_security_operations.sh b/tests/6_docker_security_operations.sh
index f5b1f01..3165986 100644
--- a/tests/6_docker_security_operations.sh
+++ b/tests/6_docker_security_operations.sh
@@ -40,8 +40,8 @@ images=$(docker images -q | wc -l | awk '{print $1}')
 active_images=0
 
 for c in $(docker inspect -f "{{.Image}}" $(docker ps -qa)); do
-  if [[ $(docker images --no-trunc -a | grep $c) ]]; then
-    ((active_images++))
+  if docker images --no-trunc -a | grep $c > /dev/null ; then
+    active_images=$(( active_images += 1 ))
   fi
 done
 
@@ -53,7 +53,7 @@ else
   info "     * There are currently: $images images"
 fi
 
-if [[ "$active_images" -lt "$((images / 2))" ]]; then
+if [ "$active_images" -lt "$((images / 2))" ]; then
   warn "     * Only $active_images out of $images are in use"
 fi