diff --git a/NEWS.md b/NEWS.md
index f3810a04..8d056c37 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,6 +4,10 @@
 
 Released 2016-mm-dd
 
+New features:
+ - Allow to use `--config /path/to/config.js` to specify configuration file.
+   - Environment will be loaded from config file if `environment` key is present, otherwise it keeps current behaviour.
+
 Bug fixes:
  - Allow to use absolute paths for log files #570.
 
diff --git a/app.js b/app.js
index e5c489e1..10943bdc 100755
--- a/app.js
+++ b/app.js
@@ -5,15 +5,30 @@ var fs = require('fs');
 
 var _ = require('underscore');
 
-var ENVIRONMENT;
-if ( process.argv[2] ) {
-    ENVIRONMENT = process.argv[2];
-} else if ( process.env.NODE_ENV ) {
-    ENVIRONMENT = process.env.NODE_ENV;
-} else {
-    ENVIRONMENT = 'development';
+var argv = require('yargs')
+    .usage('Usage: $0 <environment> [options]')
+    .help('h')
+    .example(
+    '$0 production -c /etc/sql-api/config.js',
+    'start server in production environment with /etc/sql-api/config.js as config file'
+)
+    .alias('h', 'help')
+    .alias('c', 'config')
+    .nargs('c', 1)
+    .describe('c', 'Load configuration from path')
+    .argv;
+
+var environmentArg = argv._[0] || process.env.NODE_ENV || 'development';
+var configurationFile = path.resolve(argv.config || './config/environments/' + environmentArg + '.js');
+if (!fs.existsSync(configurationFile)) {
+    console.error('Configuration file "%s" does not exist', configurationFile);
+    process.exit(1);
 }
 
+global.environment = require(configurationFile);
+var ENVIRONMENT = argv._[0] || process.env.NODE_ENV || global.environment.environment;
+process.env.NODE_ENV = ENVIRONMENT;
+
 // jshint undef:false
 var log = console.log.bind(console);
 var logError = console.error.bind(console);
@@ -33,10 +48,6 @@ if (!availableEnvironments[ENVIRONMENT]){
 }
 
 process.env.NODE_ENV = ENVIRONMENT;
-
-// set environment specific variables
-global.environment = require('./config/environments/' + ENVIRONMENT);
-
 if (global.environment.uv_threadpool_size) {
     process.env.UV_THREADPOOL_SIZE = global.environment.uv_threadpool_size;
 }
@@ -99,6 +110,7 @@ var listener = server.listen(serverOptions.bind.port, serverOptions.bind.host, b
 var version = require("./package").version;
 
 listener.on('listening', function() {
+    log('Using configuration file "%s"', configurationFile);
     log(
         "Windshaft tileserver %s started on %s:%s PID=%d (%s)",
         version, serverOptions.bind.host, serverOptions.bind.port, process.pid, ENVIRONMENT
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 90bf1058..1d254015 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -146,7 +146,7 @@
                     },
                     "inherits": {
                       "version": "2.0.3",
-                      "from": "inherits@>=2.0.0 <3.0.0",
+                      "from": "inherits@>=2.0.1 <2.1.0",
                       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz"
                     },
                     "isarray": {
@@ -2963,116 +2963,121 @@
                       "from": "node-pre-gyp@>=0.6.28 <0.7.0",
                       "resolved": "https://registry.npmjs.org/node-pre-gyp/-/node-pre-gyp-0.6.28.tgz"
                     },
-                    "are-we-there-yet": {
-                      "version": "1.1.2",
-                      "from": "are-we-there-yet@>=1.1.2 <1.2.0",
-                      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.2.tgz"
+                    "abbrev": {
+                      "version": "1.0.7",
+                      "from": "abbrev@>=1.0.0 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.7.tgz"
                     },
-                    "assert-plus": {
-                      "version": "0.2.0",
-                      "from": "assert-plus@>=0.2.0 <0.3.0",
-                      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz"
+                    "ansi": {
+                      "version": "0.3.1",
+                      "from": "ansi@>=0.3.1 <0.4.0",
+                      "resolved": "https://registry.npmjs.org/ansi/-/ansi-0.3.1.tgz"
                     },
                     "ansi-regex": {
                       "version": "2.0.0",
                       "from": "ansi-regex@>=2.0.0 <3.0.0",
                       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.0.0.tgz"
                     },
-                    "aws-sign2": {
-                      "version": "0.6.0",
-                      "from": "aws-sign2@>=0.6.0 <0.7.0",
-                      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz"
-                    },
-                    "ansi": {
-                      "version": "0.3.1",
-                      "from": "ansi@>=0.3.1 <0.4.0",
-                      "resolved": "https://registry.npmjs.org/ansi/-/ansi-0.3.1.tgz"
+                    "ansi-styles": {
+                      "version": "2.2.1",
+                      "from": "ansi-styles@>=2.2.1 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz"
                     },
-                    "abbrev": {
-                      "version": "1.0.7",
-                      "from": "abbrev@>=1.0.0 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.7.tgz"
+                    "are-we-there-yet": {
+                      "version": "1.1.2",
+                      "from": "are-we-there-yet@>=1.1.2 <1.2.0",
+                      "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.2.tgz"
                     },
                     "asn1": {
                       "version": "0.2.3",
                       "from": "asn1@>=0.2.3 <0.3.0",
                       "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz"
                     },
-                    "ansi-styles": {
-                      "version": "2.2.1",
-                      "from": "ansi-styles@>=2.2.1 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz"
-                    },
-                    "block-stream": {
-                      "version": "0.0.9",
-                      "from": "block-stream@*",
-                      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz"
-                    },
-                    "aws4": {
-                      "version": "1.4.1",
-                      "from": "aws4@>=1.2.1 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.4.1.tgz"
+                    "assert-plus": {
+                      "version": "0.2.0",
+                      "from": "assert-plus@>=0.2.0 <0.3.0",
+                      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-0.2.0.tgz"
                     },
                     "async": {
                       "version": "1.5.2",
                       "from": "async@>=1.5.2 <2.0.0",
                       "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz"
                     },
-                    "debug": {
-                      "version": "2.2.0",
-                      "from": "debug@>=2.2.0 <2.3.0",
-                      "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz"
+                    "aws-sign2": {
+                      "version": "0.6.0",
+                      "from": "aws-sign2@>=0.6.0 <0.7.0",
+                      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.6.0.tgz"
                     },
-                    "brace-expansion": {
-                      "version": "1.1.4",
-                      "from": "brace-expansion@>=1.0.0 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.4.tgz"
+                    "aws4": {
+                      "version": "1.4.1",
+                      "from": "aws4@>=1.2.1 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.4.1.tgz"
                     },
                     "balanced-match": {
                       "version": "0.4.1",
                       "from": "balanced-match@>=0.4.1 <0.5.0",
                       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-0.4.1.tgz"
                     },
-                    "combined-stream": {
-                      "version": "1.0.5",
-                      "from": "combined-stream@>=1.0.5 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz"
-                    },
                     "boom": {
                       "version": "2.10.1",
                       "from": "boom@>=2.0.0 <3.0.0",
                       "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz"
                     },
+                    "block-stream": {
+                      "version": "0.0.9",
+                      "from": "block-stream@*",
+                      "resolved": "https://registry.npmjs.org/block-stream/-/block-stream-0.0.9.tgz"
+                    },
+                    "brace-expansion": {
+                      "version": "1.1.4",
+                      "from": "brace-expansion@>=1.0.0 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.4.tgz"
+                    },
                     "chalk": {
                       "version": "1.1.3",
                       "from": "chalk@>=1.1.1 <2.0.0",
                       "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz"
                     },
+                    "caseless": {
+                      "version": "0.11.0",
+                      "from": "caseless@>=0.11.0 <0.12.0",
+                      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.11.0.tgz"
+                    },
                     "commander": {
                       "version": "2.9.0",
                       "from": "commander@>=2.9.0 <3.0.0",
                       "resolved": "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz"
                     },
-                    "caseless": {
-                      "version": "0.11.0",
-                      "from": "caseless@>=0.11.0 <0.12.0",
-                      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.11.0.tgz"
+                    "combined-stream": {
+                      "version": "1.0.5",
+                      "from": "combined-stream@>=1.0.5 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz"
+                    },
+                    "concat-map": {
+                      "version": "0.0.1",
+                      "from": "concat-map@0.0.1",
+                      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz"
                     },
                     "core-util-is": {
                       "version": "1.0.2",
                       "from": "core-util-is@>=1.0.0 <1.1.0",
                       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz"
                     },
+                    "cryptiles": {
+                      "version": "2.0.5",
+                      "from": "cryptiles@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/cryptiles/-/cryptiles-2.0.5.tgz"
+                    },
+                    "debug": {
+                      "version": "2.2.0",
+                      "from": "debug@>=2.2.0 <2.3.0",
+                      "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz"
+                    },
                     "deep-extend": {
                       "version": "0.4.1",
                       "from": "deep-extend@>=0.4.0 <0.5.0",
                       "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.4.1.tgz"
                     },
-                    "concat-map": {
-                      "version": "0.0.1",
-                      "from": "concat-map@0.0.1",
-                      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz"
-                    },
                     "delayed-stream": {
                       "version": "1.0.0",
                       "from": "delayed-stream@>=1.0.0 <1.1.0",
@@ -3083,110 +3088,120 @@
                       "from": "delegates@>=1.0.0 <2.0.0",
                       "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz"
                     },
-                    "extend": {
-                      "version": "3.0.0",
-                      "from": "extend@>=3.0.0 <3.1.0",
-                      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.0.tgz"
-                    },
-                    "fstream-ignore": {
-                      "version": "1.0.4",
-                      "from": "fstream-ignore@>=1.0.3 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/fstream-ignore/-/fstream-ignore-1.0.4.tgz"
-                    },
                     "escape-string-regexp": {
                       "version": "1.0.5",
                       "from": "escape-string-regexp@>=1.0.2 <2.0.0",
                       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz"
                     },
-                    "cryptiles": {
-                      "version": "2.0.5",
-                      "from": "cryptiles@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/cryptiles/-/cryptiles-2.0.5.tgz"
+                    "extend": {
+                      "version": "3.0.0",
+                      "from": "extend@>=3.0.0 <3.1.0",
+                      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.0.tgz"
                     },
-                    "fstream": {
-                      "version": "1.0.9",
-                      "from": "fstream@>=1.0.2 <2.0.0",
-                      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.9.tgz"
+                    "ecc-jsbn": {
+                      "version": "0.1.1",
+                      "from": "ecc-jsbn@>=0.1.1 <0.2.0",
+                      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz"
                     },
                     "extsprintf": {
                       "version": "1.0.2",
                       "from": "extsprintf@1.0.2",
                       "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.0.2.tgz"
                     },
+                    "forever-agent": {
+                      "version": "0.6.1",
+                      "from": "forever-agent@>=0.6.1 <0.7.0",
+                      "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz"
+                    },
+                    "fstream-ignore": {
+                      "version": "1.0.4",
+                      "from": "fstream-ignore@>=1.0.3 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/fstream-ignore/-/fstream-ignore-1.0.4.tgz"
+                    },
                     "form-data": {
                       "version": "1.0.0-rc4",
                       "from": "form-data@>=1.0.0-rc3 <1.1.0",
                       "resolved": "https://registry.npmjs.org/form-data/-/form-data-1.0.0-rc4.tgz"
                     },
-                    "has-unicode": {
-                      "version": "2.0.0",
-                      "from": "has-unicode@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.0.tgz"
+                    "fstream": {
+                      "version": "1.0.9",
+                      "from": "fstream@>=1.0.2 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.9.tgz"
                     },
                     "gauge": {
                       "version": "1.2.7",
                       "from": "gauge@>=1.2.5 <1.3.0",
                       "resolved": "https://registry.npmjs.org/gauge/-/gauge-1.2.7.tgz"
                     },
-                    "glob": {
-                      "version": "7.0.3",
-                      "from": "glob@>=7.0.0 <8.0.0",
-                      "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.3.tgz"
+                    "generate-function": {
+                      "version": "2.0.0",
+                      "from": "generate-function@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/generate-function/-/generate-function-2.0.0.tgz"
                     },
                     "generate-object-property": {
                       "version": "1.2.0",
                       "from": "generate-object-property@>=1.1.0 <2.0.0",
                       "resolved": "https://registry.npmjs.org/generate-object-property/-/generate-object-property-1.2.0.tgz"
                     },
-                    "forever-agent": {
-                      "version": "0.6.1",
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-                      "resolved": "https://registry.npmjs.org/forever-agent/-/forever-agent-0.6.1.tgz"
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-                      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz"
+                    "glob": {
+                      "version": "7.0.3",
+                      "from": "glob@>=7.0.0 <8.0.0",
+                      "resolved": "https://registry.npmjs.org/glob/-/glob-7.0.3.tgz"
                     },
                     "graceful-fs": {
                       "version": "4.1.4",
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                       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.4.tgz"
                     },
-                    "generate-function": {
+                    "graceful-readlink": {
+                      "version": "1.0.1",
+                      "from": "graceful-readlink@>=1.0.0",
+                      "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz"
+                    },
+                    "has-ansi": {
                       "version": "2.0.0",
-                      "from": "generate-function@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/generate-function/-/generate-function-2.0.0.tgz"
+                      "from": "has-ansi@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-2.0.0.tgz"
+                    },
+                    "har-validator": {
+                      "version": "2.0.6",
+                      "from": "har-validator@>=2.0.6 <2.1.0",
+                      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-2.0.6.tgz"
+                    },
+                    "has-unicode": {
+                      "version": "2.0.0",
+                      "from": "has-unicode@>=2.0.0 <3.0.0",
+                      "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.0.tgz"
+                    },
+                    "hawk": {
+                      "version": "3.1.3",
+                      "from": "hawk@>=3.1.3 <3.2.0",
+                      "resolved": "https://registry.npmjs.org/hawk/-/hawk-3.1.3.tgz"
                     },
                     "hoek": {
                       "version": "2.16.3",
                       "from": "hoek@>=2.0.0 <3.0.0",
                       "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz"
                     },
-                    "graceful-readlink": {
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-                      "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz"
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                     "http-signature": {
                       "version": "1.1.1",
                       "from": "http-signature@>=1.1.0 <1.2.0",
                       "resolved": "https://registry.npmjs.org/http-signature/-/http-signature-1.1.1.tgz"
                     },
-                    "is-typedarray": {
-                      "version": "1.0.0",
-                      "from": "is-typedarray@>=1.0.0 <1.1.0",
-                      "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz"
+                    "inflight": {
+                      "version": "1.0.4",
+                      "from": "inflight@>=1.0.4 <2.0.0",
+                      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.4.tgz"
                     },
-                    "har-validator": {
-                      "version": "2.0.6",
-                      "from": "har-validator@>=2.0.6 <2.1.0",
-                      "resolved": "https://registry.npmjs.org/har-validator/-/har-validator-2.0.6.tgz"
+                    "inherits": {
+                      "version": "2.0.1",
+                      "from": "inherits@>=2.0.1 <2.1.0",
+                      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
                     },
-                    "isstream": {
-                      "version": "0.1.2",
-                      "from": "isstream@>=0.1.2 <0.2.0",
-                      "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz"
+                    "ini": {
+                      "version": "1.3.4",
+                      "from": "ini@>=1.3.0 <1.4.0",
+                      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.4.tgz"
                     },
                     "is-my-json-valid": {
                       "version": "2.13.1",
@@ -3198,50 +3213,45 @@
                       "from": "is-property@>=1.0.0 <2.0.0",
                       "resolved": "https://registry.npmjs.org/is-property/-/is-property-1.0.2.tgz"
                     },
-                    "inherits": {
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-                      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.1.tgz"
-                    },
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-                      "version": "5.0.1",
-                      "from": "json-stringify-safe@>=5.0.1 <5.1.0",
-                      "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz"
+                    "is-typedarray": {
+                      "version": "1.0.0",
+                      "from": "is-typedarray@>=1.0.0 <1.1.0",
+                      "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz"
                     },
                     "isarray": {
                       "version": "1.0.0",
                       "from": "isarray@>=1.0.0 <1.1.0",
                       "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz"
                     },
-                    "json-schema": {
-                      "version": "0.2.2",
-                      "from": "json-schema@0.2.2",
-                      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.2.tgz"
-                    },
-                    "hawk": {
-                      "version": "3.1.3",
-                      "from": "hawk@>=3.1.3 <3.2.0",
-                      "resolved": "https://registry.npmjs.org/hawk/-/hawk-3.1.3.tgz"
-                    },
-                    "lodash._basetostring": {
-                      "version": "4.12.0",
-                      "from": "lodash._basetostring@>=4.12.0 <4.13.0",
-                      "resolved": "https://registry.npmjs.org/lodash._basetostring/-/lodash._basetostring-4.12.0.tgz"
+                    "isstream": {
+                      "version": "0.1.2",
+                      "from": "isstream@>=0.1.2 <0.2.0",
+                      "resolved": "https://registry.npmjs.org/isstream/-/isstream-0.1.2.tgz"
                     },
-                    "has-ansi": {
-                      "version": "2.0.0",
-                      "from": "has-ansi@>=2.0.0 <3.0.0",
-                      "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-2.0.0.tgz"
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   }
 }
diff --git a/package.json b/package.json
index dc192aee..27f10102 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,8 @@
     "step-profiler": "~0.3.0",
     "turbo-carto": "0.16.0",
     "underscore": "~1.6.0",
-    "windshaft": "2.5.0"
+    "windshaft": "2.5.0",
+    "yargs": "~5.0.0"
   },
   "devDependencies": {
     "istanbul": "~0.4.3",