diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..9dfe5fd
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,22 @@
+image: elixir:latest
+
+services:
+  - postgres:latest
+
+variables:
+  POSTGRES_DB: test_test
+  POSTGRES_HOST: postgres
+  POSTGRES_USER: postgres
+  POSTGRES_PASSWORD: "postgres"
+  MIX_ENV: "test"
+
+before_script:
+  - apt-get update && apt-get -y install postgresql-client
+  - mix local.rebar --force
+  - mix local.hex --force
+  - mix deps.get
+  - mix deps.compile
+
+mix:
+  script:
+    - mix test
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index a009e1e..7ca6aa0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,7 +21,7 @@ RUN apt-get update \
 RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
     && sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' \
     && apt-get update \
-    && apt-get install -y google-chrome-stable --no-install-recommends \
+    && apt-get install -y git google-chrome-stable --no-install-recommends \
     && rm -rf /var/lib/apt/lists/* \
     && rm -rf /src/*.deb
 
diff --git a/config/config.exs b/config/config.exs
index d8b2801..e18d4c8 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -26,25 +26,41 @@ envar = fn name ->
 end
 
 config :logger,
-  :console,
-  metadata: [:request_id, :pid, :module],
-  level: :debug
+       :console,
+       metadata: [:request_id, :pid, :module],
+       level: :debug
 
 config :chroxy,
-  chrome_remote_debug_port_from: envar.("CHROXY_CHROME_PORT_FROM") || "9222",
-  chrome_remote_debug_port_to: envar.("CHROXY_CHROME_PORT_TO") || "9223"
+       chrome_remote_debug_port_from: envar.("CHROXY_CHROME_PORT_FROM") || "9222",
+       chrome_remote_debug_port_to: envar.("CHROXY_CHROME_PORT_TO") || "9223"
 
 config :chroxy, Chroxy.ProxyListener,
-  host: envar.("CHROXY_PROXY_HOST") || "127.0.0.1",
-  port: envar.("CHROXY_PROXY_PORT") || "1331"
+       host: envar.("CHROXY_PROXY_HOST") || "127.0.0.1",
+       port: envar.("CHROXY_PROXY_PORT") || "1331"
 
 config :chroxy, Chroxy.ProxyServer, packet_trace: false
 
 config :chroxy, Chroxy.Endpoint,
-  scheme: :http,
-  port: envar.("CHROXY_ENDPOINT_PORT") || "1330"
+       scheme: :http,
+       port: envar.("CHROXY_ENDPOINT_PORT") || "1330"
 
 config :chroxy, Chroxy.ChromeServer,
-  page_wait_ms: envar.("CHROXY_CHROME_SERVER_PAGE_WAIT_MS") || "200",
-  crash_dumps_dir: envar.("CHROME_CHROME_SERVER_CRASH_DUMPS_DIR") || "/tmp",
-  verbose_logging: 0
+       page_wait_ms: envar.("CHROXY_CHROME_SERVER_PAGE_WAIT_MS") || "200",
+       crash_dumps_dir: envar.("CHROME_CHROME_SERVER_CRASH_DUMPS_DIR") || "/tmp",
+       verbose_logging: 0,
+       chrome_flags: ~w(
+        --headless
+        --disable-gpu
+        --disable-translate
+        --disable-extensions
+        --disable-background-networking
+        --safebrowsing-disable-auto-update
+        --enable-logging
+        --disable-sync
+        --metrics-recording-only
+        --disable-default-apps
+        --mute-audio
+        --no-first-run
+        --no-sandbox
+        --incognito
+      )
diff --git a/lib/chroxy/chrome_server.ex b/lib/chroxy/chrome_server.ex
index 4f97712..fec89ae 100644
--- a/lib/chroxy/chrome_server.ex
+++ b/lib/chroxy/chrome_server.ex
@@ -320,25 +320,12 @@ defmodule Chroxy.ChromeServer do
   end
 
   defp default_opts do
+    # --headless
+
     [
       chrome_port: 9222,
       chrome_path: chrome_path(),
-      chrome_flags: ~w(
-        --headless
-        --disable-gpu
-        --disable-translate
-        --disable-extensions
-        --disable-background-networking
-        --safebrowsing-disable-auto-update
-        --enable-logging
-        --disable-sync
-        --metrics-recording-only
-        --disable-default-apps
-        --mute-audio
-        --no-first-run
-        --no-sandbox
-        --incognito
-      ),
+      chrome_flags: Application.get_env(:chroxy, Chroxy.ChromeServer)[:chrome_flags],
       verbose_logging: 0,
       crash_dumps_dir: "/tmp"
     ]
diff --git a/mix.exs b/mix.exs
index 1afaee0..3db39f1 100644
--- a/mix.exs
+++ b/mix.exs
@@ -26,10 +26,10 @@ defmodule Chroxy.MixProject do
   defp deps do
     [
       {:plug, "~> 1.8.0"},
-      {:plug_cowboy, "~> 2.0.2"},
+      {:plug_cowboy, "~> 2.0"},
       {:cowboy, "~> 2.6.3"},
       {:jason, "~> 1.1"},
-      {:erlexec, "~> 1.10.0"},
+      {:erlexec, git: "https://github.com/saleyn/erlexec.git", override: true },
       {:exexec, "~> 0.2"},
       {:chrome_remote_interface, "~> 0.3.0"},
       {:ex_doc, "~> 0.20", only: :dev, runtime: false}
diff --git a/mix.lock b/mix.lock
index 4dcce30..686b92d 100644
--- a/mix.lock
+++ b/mix.lock
@@ -4,7 +4,7 @@
   "cowboy": {:hex, :cowboy, "2.6.3", "99aa50e94e685557cad82e704457336a453d4abcb77839ad22dbe71f311fcc06", [:rebar3], [{:cowlib, "~> 2.7.3", [hex: :cowlib, repo: "hexpm", optional: false]}, {:ranch, "~> 1.7.1", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm"},
   "cowlib": {:hex, :cowlib, "2.7.3", "a7ffcd0917e6d50b4d5fb28e9e2085a0ceb3c97dea310505f7460ff5ed764ce9", [:rebar3], [], "hexpm"},
   "earmark": {:hex, :earmark, "1.3.2", "b840562ea3d67795ffbb5bd88940b1bed0ed9fa32834915125ea7d02e35888a5", [:mix], [], "hexpm"},
-  "erlexec": {:hex, :erlexec, "1.10.0", "cba7924cf526097d2082ceb0ec34e7db6bca2624b8f3867fb3fa89c4cf25d227", [:rebar3], [], "hexpm"},
+  "erlexec": {:git, "https://github.com/saleyn/erlexec.git", "c84cbad85ad1fd5cc4d24118313e90fe907ce886", []},
   "ex_doc": {:hex, :ex_doc, "0.20.2", "1bd0dfb0304bade58beb77f20f21ee3558cc3c753743ae0ddbb0fd7ba2912331", [:mix], [{:earmark, "~> 1.3", [hex: :earmark, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.10", [hex: :makeup_elixir, repo: "hexpm", optional: false]}], "hexpm"},
   "exexec": {:hex, :exexec, "0.2.0", "a6ffc48cba3ac9420891b847e4dc7120692fb8c08c9e82220ebddc0bb8d96103", [:mix], [{:erlexec, "~> 1.10", [hex: :erlexec, repo: "hexpm", optional: false]}], "hexpm"},
   "hackney": {:hex, :hackney, "1.15.1", "9f8f471c844b8ce395f7b6d8398139e26ddca9ebc171a8b91342ee15a19963f4", [:rebar3], [{:certifi, "2.5.1", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "6.0.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "1.0.1", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "1.1.4", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}], "hexpm"},