diff --git a/adapters/stroeerCore/stroeercore.go b/adapters/stroeerCore/stroeercore.go
index 57dc2b0cd72..087a9de7e9e 100644
--- a/adapters/stroeerCore/stroeercore.go
+++ b/adapters/stroeerCore/stroeercore.go
@@ -32,12 +32,10 @@ type bidResponse struct {
 	Ad      string          `json:"ad"`
 	CrID    string          `json:"crid"`
 	Mtype   string          `json:"mtype"`
-	DSA     json.RawMessage `json:"dsa"`
 	ADomain []string        `json:"adomain,omitempty"`
-}
-
-type bidExt struct {
-	DSA json.RawMessage `json:"dsa,omitempty"`
+	Ext     json.RawMessage `json:"ext,omitempty"`
+	// Deprecated: The dsa will move to the bid response's ext.
+	DSA json.RawMessage `json:"dsa"`
 }
 
 func (b *bidResponse) resolveMediaType() (mt openrtb2.MarkupType, bt openrtb_ext.BidType, err error) {
@@ -88,15 +86,7 @@ func (a *adapter) MakeBids(bidRequest *openrtb2.BidRequest, requestData *adapter
 			CrID:    bid.CrID,
 			MType:   markupType,
 			ADomain: bid.ADomain,
-		}
-
-		if bid.DSA != nil {
-			dsaJson, err := json.Marshal(bidExt{bid.DSA})
-			if err != nil {
-				errors = append(errors, err)
-			} else {
-				openRtbBid.Ext = dsaJson
-			}
+			Ext:     getBidExt(bid),
 		}
 
 		bidderResponse.Bids = append(bidderResponse.Bids, &adapters.TypedBid{
@@ -108,6 +98,19 @@ func (a *adapter) MakeBids(bidRequest *openrtb2.BidRequest, requestData *adapter
 	return bidderResponse, errors
 }
 
+func getBidExt(bid bidResponse) json.RawMessage {
+	if bid.DSA == nil {
+		return bid.Ext
+	}
+	extMap := map[string]json.RawMessage{}
+	if bid.Ext != nil {
+		_ = jsonutil.Unmarshal(bid.Ext, &extMap)
+	}
+	extMap["dsa"] = bid.DSA
+	ext, _ := json.Marshal(extMap)
+	return ext
+}
+
 func (a *adapter) MakeRequests(bidRequest *openrtb2.BidRequest, extraRequestInfo *adapters.ExtraRequestInfo) ([]*adapters.RequestData, []error) {
 	var errors []error
 
diff --git a/adapters/stroeerCore/stroeercoretest/exemplary/bid-ext.json b/adapters/stroeerCore/stroeercoretest/exemplary/bid-ext.json
new file mode 100644
index 00000000000..43e997e25b3
--- /dev/null
+++ b/adapters/stroeerCore/stroeercoretest/exemplary/bid-ext.json
@@ -0,0 +1,207 @@
+{
+  "mockBidRequest": {
+    "id": "auction-id",
+    "cur": [
+      "EUR"
+    ],
+    "imp": [
+      {
+        "id": "1",
+        "banner": {
+          "format": [
+            {
+              "w": 300,
+              "h": 600
+            }
+          ]
+        },
+        "ext": {
+          "bidder": {
+            "sid": "123456"
+          }
+        }
+      }
+    ],
+    "device": {
+      "ip": "123.123.123.123"
+    },
+    "site": {
+      "domain": "www.publisher.com",
+      "page": "http://www.publisher.com/some/path"
+    },
+    "user": {
+      "buyeruid": "test-buyer-user-id"
+    },
+    "regs": {
+      "ext": {
+        "dsa": {
+          "dsarequired": 3,
+          "pubrender": 0,
+          "datatopub": 2,
+          "transparency": [
+            {
+              "domain": "example-platform.com",
+              "dsaparams": [
+                1
+              ]
+            },
+            {
+              "domain": "example-ssp.com",
+              "dsaparams": [
+                1,
+                2
+              ]
+            }
+          ]
+        }
+      }
+    }
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "headers": {
+          "Accept": [
+            "application/json"
+          ],
+          "Content-Type": [
+            "application/json;charset=utf-8"
+          ]
+        },
+        "uri": "http://localhost/s2sdsh",
+        "body": {
+          "id": "auction-id",
+          "cur": [
+            "EUR"
+          ],
+          "imp": [
+            {
+              "id": "1",
+              "tagid": "123456",
+              "banner": {
+                "format": [
+                  {
+                    "w": 300,
+                    "h": 600
+                  }
+                ]
+              },
+              "ext": {
+                "bidder": {
+                  "sid": "123456"
+                }
+              }
+            }
+          ],
+          "device": {
+            "ip": "123.123.123.123"
+          },
+          "site": {
+            "domain": "www.publisher.com",
+            "page": "http://www.publisher.com/some/path"
+          },
+          "user": {
+            "buyeruid": "test-buyer-user-id"
+          },
+          "regs": {
+            "ext": {
+              "dsa": {
+                "dsarequired": 3,
+                "pubrender": 0,
+                "datatopub": 2,
+                "transparency": [
+                  {
+                    "domain": "example-platform.com",
+                    "dsaparams": [
+                      1
+                    ]
+                  },
+                  {
+                    "domain": "example-ssp.com",
+                    "dsaparams": [
+                      1,
+                      2
+                    ]
+                  }
+                ]
+              }
+            }
+          }
+        },
+        "impIDs":["1"]
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "test-request-id",
+          "bids": [
+            {
+              "id": "1829273982920-01",
+              "bidId": "1",
+              "cpm": 2,
+              "width": 300,
+              "height": 600,
+              "ad": "advert",
+              "crid": "wasd",
+              "mtype": "banner",
+              "ext": {
+                "other": "thing",
+                "dsa": {
+                  "behalf": "Advertiser A",
+                  "paid": "Advertiser B",
+                  "transparency": [
+                    {
+                      "domain": "example-domain.com",
+                      "dsaparams": [
+                        1,
+                        2
+                      ]
+                    }
+                  ],
+                  "adrender": 1
+                }
+              }
+            }
+          ]
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "currency": "EUR",
+      "bids": [
+        {
+          "bid": {
+            "id": "1829273982920-01",
+            "impid": "1",
+            "price": 2,
+            "adm": "advert",
+            "w": 300,
+            "h": 600,
+            "crid": "wasd",
+            "mtype": 1,
+            "ext": {
+              "other": "thing",
+              "dsa": {
+                "behalf": "Advertiser A",
+                "paid": "Advertiser B",
+                "transparency": [
+                  {
+                    "domain": "example-domain.com",
+                    "dsaparams": [
+                      1,
+                      2
+                    ]
+                  }
+                ],
+                "adrender": 1
+              }
+            }
+          },
+          "type": "banner"
+        }
+      ]
+    }
+  ]
+}
diff --git a/adapters/stroeerCore/stroeercoretest/exemplary/dsa.json b/adapters/stroeerCore/stroeercoretest/exemplary/deprecated-json-path-for-dsa.json
similarity index 97%
rename from adapters/stroeerCore/stroeercoretest/exemplary/dsa.json
rename to adapters/stroeerCore/stroeercoretest/exemplary/deprecated-json-path-for-dsa.json
index 97355da9053..b2c21511d55 100644
--- a/adapters/stroeerCore/stroeercoretest/exemplary/dsa.json
+++ b/adapters/stroeerCore/stroeercoretest/exemplary/deprecated-json-path-for-dsa.json
@@ -157,6 +157,9 @@
                   }
                 ],
                 "adrender": 1
+              },
+              "ext": {
+                "something": "else"
               }
             }
           ]
@@ -192,7 +195,8 @@
                   }
                 ],
                 "adrender": 1
-              }
+              },
+              "something": "else"
             }
           },
           "type": "banner"