diff --git a/modules/adgenerationBidAdapter.js b/modules/adgenerationBidAdapter.js
index f18b7629d8f..9cd7fbc1b80 100644
--- a/modules/adgenerationBidAdapter.js
+++ b/modules/adgenerationBidAdapter.js
@@ -28,7 +28,7 @@ export const spec = {
   buildRequests: function (validBidRequests, bidderRequest) {
     // convert Native ORTB definition to old-style prebid native definition
     validBidRequests = convertOrtbRequestToProprietaryNative(validBidRequests);
-    const ADGENE_PREBID_VERSION = '1.6.0';
+    const ADGENE_PREBID_VERSION = '1.6.1';
     let serverRequests = [];
     for (let i = 0, len = validBidRequests.length; i < len; i++) {
       const validReq = validBidRequests[i];
@@ -59,9 +59,9 @@ export const spec = {
       data = tryAppendQueryString(data, 'adgext_id5_id_link_type', id5LinkType);
       data = tryAppendQueryString(data, 'adgext_imuid', imuid);
       data = tryAppendQueryString(data, 'adgext_uid2', validReq.userId ? validReq.userId.uid2 : null);
-      data = tryAppendQueryString(data, 'gpid', gpid ? encodeURIComponent(gpid) : null);
+      data = tryAppendQueryString(data, 'gpid', gpid || null);
       data = tryAppendQueryString(data, 'uach', sua ? JSON.stringify(sua) : null);
-      data = tryAppendQueryString(data, 'schain', validReq.schain ? encodeURIComponent(JSON.stringify(validReq.schain)) : null);
+      data = tryAppendQueryString(data, 'schain', validReq.schain ? JSON.stringify(validReq.schain) : null);
 
       // native以外にvideo等の対応が入った場合は要修正
       if (!validReq.mediaTypes || !validReq.mediaTypes.native) {
diff --git a/test/spec/modules/adgenerationBidAdapter_spec.js b/test/spec/modules/adgenerationBidAdapter_spec.js
index de8463731e0..55ba5654245 100644
--- a/test/spec/modules/adgenerationBidAdapter_spec.js
+++ b/test/spec/modules/adgenerationBidAdapter_spec.js
@@ -184,12 +184,12 @@ describe('AdgenerationAdapter', function () {
       }
     };
     const data = {
-      banner: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=300x250%2C320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.0&imark=1&tp=https%3A%2F%2Fexample.com`,
-      bannerUSD: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=300x250%2C320x100&currency=USD&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.0&imark=1&tp=https%3A%2F%2Fexample.com`,
-      native: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=1x1&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.0&tp=https%3A%2F%2Fexample.com`,
-      bannerWithHyperId: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.0&imark=1&tp=https%3A%2F%2Fexample.com&hyper_id=novatiqId`,
-      bannerWithAdgextCriteoId: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.0&adgext_criteo_id=criteo-id-test-1234567890&imark=1&tp=https%3A%2F%2Fexample.com`,
-      bannerWithAdgextIds: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.0&adgext_id5_id=id5-id-test-1234567890&adgext_id5_id_link_type=2&adgext_imuid=i.KrAH6ZAZTJOnH5S4N2sogA&adgext_uid2=%5Bobject%20Object%5D&gpid=%252F1111%252Fhomepage%2523300x250&uach=%7B%22source%22%3A2%2C%22platform%22%3A%7B%22brand%22%3A%22macOS%22%7D%2C%22browsers%22%3A%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%5B%22112%22%5D%7D%2C%7B%22brand%22%3A%22Google%20Chrome%22%2C%22version%22%3A%5B%22112%22%5D%7D%2C%7B%22brand%22%3A%22Not%3AA-Brand%22%2C%22version%22%3A%5B%2299%22%5D%7D%5D%2C%22mobile%22%3A0%7D&schain=%257B%2522ver%2522%253A%25221.0%2522%252C%2522complete%2522%253A1%252C%2522nodes%2522%253A%255B%257B%2522asi%2522%253A%2522indirectseller.com%2522%252C%2522sid%2522%253A%252200001%2522%252C%2522hp%2522%253A1%257D%255D%257D&imark=1&tp=https%3A%2F%2Fexample.com`,
+      banner: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=300x250%2C320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.1&imark=1&tp=https%3A%2F%2Fexample.com`,
+      bannerUSD: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=300x250%2C320x100&currency=USD&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.1&imark=1&tp=https%3A%2F%2Fexample.com`,
+      native: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=1x1&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.1&tp=https%3A%2F%2Fexample.com`,
+      bannerWithHyperId: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.1&imark=1&tp=https%3A%2F%2Fexample.com&hyper_id=novatiqId`,
+      bannerWithAdgextCriteoId: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.1&adgext_criteo_id=criteo-id-test-1234567890&imark=1&tp=https%3A%2F%2Fexample.com`,
+      bannerWithAdgextIds: `posall=SSPLOC&id=58278&sdktype=0&hb=true&t=json3&sizes=320x100&currency=JPY&pbver=${prebid.version}&sdkname=prebidjs&adapterver=1.6.1&adgext_id5_id=id5-id-test-1234567890&adgext_id5_id_link_type=2&adgext_imuid=i.KrAH6ZAZTJOnH5S4N2sogA&adgext_uid2=%5Bobject%20Object%5D&gpid=%2F1111%2Fhomepage%23300x250&uach=%7B%22source%22%3A2%2C%22platform%22%3A%7B%22brand%22%3A%22macOS%22%7D%2C%22browsers%22%3A%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%5B%22112%22%5D%7D%2C%7B%22brand%22%3A%22Google%20Chrome%22%2C%22version%22%3A%5B%22112%22%5D%7D%2C%7B%22brand%22%3A%22Not%3AA-Brand%22%2C%22version%22%3A%5B%2299%22%5D%7D%5D%2C%22mobile%22%3A0%7D&schain=%7B%22ver%22%3A%221.0%22%2C%22complete%22%3A1%2C%22nodes%22%3A%5B%7B%22asi%22%3A%22indirectseller.com%22%2C%22sid%22%3A%2200001%22%2C%22hp%22%3A1%7D%5D%7D&imark=1&tp=https%3A%2F%2Fexample.com`,
     };
     it('sends bid request to ENDPOINT via GET', function () {
       const request = spec.buildRequests(bidRequests, bidderRequest)[0];