diff --git a/modules/stnBidAdapter.js b/modules/stnBidAdapter.js
index 633e941b3b7..42b69ee7c2b 100644
--- a/modules/stnBidAdapter.js
+++ b/modules/stnBidAdapter.js
@@ -139,19 +139,18 @@ registerBidder(spec);
  * Get floor price
  * @param bid {bid}
  * @param mediaType {String}
- * @param currency {String}
  * @returns {Number}
  */
-function getFloor(bid, mediaType, currency) {
+function getFloor(bid, mediaType) {
   if (!isFn(bid.getFloor)) {
     return 0;
   }
   let floorResult = bid.getFloor({
-    currency: currency,
+    currency: DEFAULT_CURRENCY,
     mediaType: mediaType,
     size: '*'
   });
-  return floorResult.currency === currency && floorResult.floor ? floorResult.floor : 0;
+  return floorResult.currency === DEFAULT_CURRENCY && floorResult.floor ? floorResult.floor : 0;
 }
 
 /**
@@ -289,7 +288,6 @@ function generateBidParameters(bid, bidderRequest) {
   const {params} = bid;
   const mediaType = isBanner(bid) ? BANNER : VIDEO;
   const sizesArray = getSizesArray(bid, mediaType);
-  const currency = params.currency || config.getConfig('currency.adServerCurrency') || DEFAULT_CURRENCY;
 
   // fix floor price in case of NAN
   if (isNaN(params.floorPrice)) {
@@ -300,8 +298,7 @@ function generateBidParameters(bid, bidderRequest) {
     mediaType,
     adUnitCode: getBidIdParameter('adUnitCode', bid),
     sizes: sizesArray,
-    currency: currency,
-    floorPrice: Math.max(getFloor(bid, mediaType, currency), params.floorPrice),
+    floorPrice: Math.max(getFloor(bid, mediaType), params.floorPrice),
     bidId: getBidIdParameter('bidId', bid),
     loop: getBidIdParameter('bidderRequestsCount', bid),
     bidderRequestId: getBidIdParameter('bidderRequestId', bid),
diff --git a/modules/stnBidAdapter.md b/modules/stnBidAdapter.md
index 46374c5a53d..90b0b58e34b 100644
--- a/modules/stnBidAdapter.md
+++ b/modules/stnBidAdapter.md
@@ -24,7 +24,6 @@ The adapter supports Video(instream) & Banner.
 | `floorPrice` | optional | Number | Minimum price in USD. Misuse of this parameter can impact revenue | 2.00
 | `placementId` | optional | String | A unique placement identifier                                     | "12345678"
 | `testMode` | optional | Boolean | This activates the test mode                                      | true
-| `currency` | optional | String | 3 letters currency                                                | "EUR"
 
 # Test Parameters
 ```javascript
diff --git a/test/spec/modules/stnBidAdapter_spec.js b/test/spec/modules/stnBidAdapter_spec.js
index deba87baac2..95cab32e41d 100644
--- a/test/spec/modules/stnBidAdapter_spec.js
+++ b/test/spec/modules/stnBidAdapter_spec.js
@@ -178,16 +178,6 @@ describe('stnAdapter', function () {
       expect(request.data.bids[1].mediaType).to.equal(BANNER)
     });
 
-    it('should send the correct currency in bid request', function () {
-      const bid = utils.deepClone(bidRequests[0]);
-      bid.params = {
-        'currency': 'EUR'
-      };
-      const expectedCurrency = bid.params.currency;
-      const request = spec.buildRequests([bid], bidderRequest);
-      expect(request.data.bids[0].currency).to.equal(expectedCurrency);
-    });
-
     it('should respect syncEnabled option', function() {
       config.setConfig({
         userSync: {