diff --git a/doc/rest2.md b/doc/rest2.md
index 9bc09628..5ecbda1b 100644
--- a/doc/rest2.md
+++ b/doc/rest2.md
@@ -43,6 +43,7 @@ Communicates with v2 of the Bitfinex HTTP API
     * [.calcAvailableBalance(symbol, dir, rate, type, cb)](#RESTv2+calcAvailableBalance) ⇒ <code>Promise</code>
     * [.symbols(cb)](#RESTv2+symbols) ⇒ <code>Promise</code>
     * [.futures(cb)](#RESTv2+futures) ⇒ <code>Promise</code>
+    * [.derivsPositionCollateralSet(symbol, collateral, cb)](#RESTv2+derivsPositionCollateralSet) ⇒ <code>Promise</code>
     * ~~[.symbolDetails(cb)](#RESTv2+symbolDetails) ⇒ <code>Promise</code>~~
     * ~~[.accountInfo(cb)](#RESTv2+accountInfo) ⇒ <code>Promise</code>~~
     * ~~[.accountFees(cb)](#RESTv2+accountFees) ⇒ <code>Promise</code>~~
@@ -562,6 +563,21 @@ Get a list of valid symbol names
 | --- | --- | --- |
 | cb | <code>Method</code> | legacy callback |
 
+<a name="RESTv2+derivsPositionCollateralSet"></a>
+### resTv2.derivsPositionCollateralSet(symbol, collateral, cb) ⇒ <code>Promise</code>
+
+Changes the collateral value of an active derivatives position for a certain pair.
+
+**Kind**: instance method of <code>[RESTv2](#RESTv2)</code>  
+**Returns**: <code>Promise</code> - p  
+**See**: https://docs.bitfinex.com/v2/reference#rest-auth-deriv-pos-collateral-set
+
+| Param | Type | Description |
+| --- | --- | --- |
+| symbol | <code>string</code> | <code>&quot;tBTCF0:USDF0&quot;</code> |
+| collateral | <code>number</code> |  |
+| cb | <code>Method</code> |  |
+
 <a name="RESTv2+symbolDetails"></a>
 
 ### ~~resTv2.symbolDetails(cb) ⇒ <code>Promise</code>~~
diff --git a/lib/rest2.js b/lib/rest2.js
index af165d0e..0362fad8 100644
--- a/lib/rest2.js
+++ b/lib/rest2.js
@@ -886,6 +886,24 @@ class RESTv2 {
     })
   }
 
+  /**
+   * Changes the collateral value of an active derivatives position for a certain pair.
+   *
+   * @param {string} symbol
+   * @param {number} collateral
+   * @param {Method?} cb - legacy callback
+   * @return {Promise} p
+   * @see https://docs.bitfinex.com/v2/reference#rest-auth-deriv-pos-collateral-set
+   */
+
+  derivsPositionCollateralSet (symbol, collateral, cb) {
+    const url = '/auth/w/deriv/collateral/set'
+    const isRequestValid = (res) => !!(res && res[0] && res[0][0])
+    return this._makeAuthRequest(url, {
+      symbol, collateral
+    }, cb, isRequestValid)
+  }
+
   /**
    * Get a list of valid symbol names and details
    *
diff --git a/package.json b/package.json
index b2f963ff..fd8971b3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bfx-api-node-rest",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "Official Bitfinex REST v1 & v2 API interfaces",
   "engines": {
     "node": ">=7"
@@ -37,15 +37,15 @@
     "url": "https://github.com/bitfinexcom/bfx-api-node-rest/issues"
   },
   "devDependencies": {
-    "bfx-api-mock-srv": "git+https://github.com/bitfinexcom/bfx-api-mock-srv.git",
     "babel-cli": "^6.26.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-plugin-transform-regenerator": "^6.26.0",
     "babel-preset-env": "^1.7.0",
+    "bfx-api-mock-srv": "git+https://github.com/bitfinexcom/bfx-api-mock-srv.git",
     "chai": "^3.4.1",
-    "mocha": "^3.4.2",
-    "standard": "^10.0.2",
-    "jsdoc-to-markdown": "^1.3.1"
+    "jsdoc-to-markdown": "^5.0.0",
+    "mocha": "^6.1.4",
+    "standard": "^10.0.2"
   },
   "dependencies": {
     "bfx-api-node-models": "^1.0.0",
@@ -53,7 +53,7 @@
     "bluebird": "^3.5.1",
     "copy": "^0.3.2",
     "debug": "^2.2.0",
-    "lodash": "^4.17.4",
+    "lodash": "^4.17.14",
     "request": "^2.67.0",
     "request-promise": "^4.2.0"
   }
diff --git a/test/lib/rest-2-integration.js b/test/lib/rest-2-integration.js
index 9c0242c7..5f3db45c 100644
--- a/test/lib/rest-2-integration.js
+++ b/test/lib/rest-2-integration.js
@@ -119,6 +119,7 @@ describe('RESTv2 integration (mock server) tests', () => {
     ['fundingTrades', 'f_trade_hist.sym.start.end.limit', ['sym', 'start', 'end', 'limit']],
     ['marginInfo', 'margin_info.k', ['k']],
     ['fundingInfo', 'f_info.k', ['k']],
+    ['derivsPositionCollateralSet', 'derivs_pos_col_set.symbol.collateral', ['symbol', 'collateral']],
     ['performance'],
     ['calcAvailableBalance', 'calc.sym.dir.rate.type', ['sym', 'dir', 'rate', 'type']]
   ]