diff --git a/adapters/adtarget/adtarget.go b/adapters/adtarget/adtarget.go
index 8c5d11704a5..7ec92c60a58 100644
--- a/adapters/adtarget/adtarget.go
+++ b/adapters/adtarget/adtarget.go
@@ -185,7 +185,13 @@ func validateImpressionAndSetExt(imp *openrtb2.Imp) (int, error) {
 
 	imp.Ext = impExtBuffer
 
-	return impExt.SourceId, nil
+	aid, err := impExt.SourceId.Int64()
+	if err != nil {
+		return 0, &errortypes.BadInput{
+			Message: fmt.Sprintf("ignoring imp id=%s, aid parsing err: %s", imp.ID, err),
+		}
+	}
+	return int(aid), nil
 }
 
 // Builder builds a new instance of the Adtarget adapter for the given bidder with the given config.
diff --git a/adapters/adtarget/adtargettest/supplemental/wrong-impression-ext.json b/adapters/adtarget/adtargettest/supplemental/wrong-impression-ext.json
index 1986dfaf13f..ee59cf36439 100644
--- a/adapters/adtarget/adtargettest/supplemental/wrong-impression-ext.json
+++ b/adapters/adtarget/adtargettest/supplemental/wrong-impression-ext.json
@@ -19,7 +19,7 @@
 
   "expectedMakeRequestsErrors": [
     {
-      "value": "ignoring imp id=unsupported-native-imp, error while decoding impExt, err: json: cannot unmarshal string into Go struct field ExtImpAdtarget.aid of type int",
+      "value": "ignoring imp id=unsupported-native-imp, error while decoding impExt, err: json: invalid number literal, trying to unmarshal \"\\\"some string instead of int\\\"\" into Number",
       "comparison": "literal"
     }
   ]
diff --git a/adapters/adtarget/params_test.go b/adapters/adtarget/params_test.go
index d0993215086..9af435d5753 100644
--- a/adapters/adtarget/params_test.go
+++ b/adapters/adtarget/params_test.go
@@ -33,16 +33,21 @@ func TestInvalidParams(t *testing.T) {
 
 	for _, invalidParam := range invalidParams {
 		if err := validator.Validate(openrtb_ext.BidderAdtarget, json.RawMessage(invalidParam)); err == nil {
-			t.Errorf("Schema allowed unexpected params: %s", invalidParam)
+			ext := openrtb_ext.ExtImpAdtarget{}
+			err = json.Unmarshal([]byte(invalidParam), &ext)
+			if err == nil {
+				t.Errorf("Schema allowed unexpected params: %s", invalidParam)
+			}
 		}
 	}
 }
 
 var validParams = []string{
 	`{"aid":123}`,
+	`{"aid":"123"}`,
 	`{"aid":123,"placementId":1234}`,
 	`{"aid":123,"siteId":4321}`,
-	`{"aid":123,"siteId":0,"bidFloor":0}`,
+	`{"aid":"123","siteId":0,"bidFloor":0}`,
 }
 
 var invalidParams = []string{
@@ -53,8 +58,7 @@ var invalidParams = []string{
 	`4.2`,
 	`[]`,
 	`{}`,
-	`{"aid":"123"}`,
-	`{"aid":"0"}`,
+	`{"aid":"qwerty"}`,
 	`{"aid":"123","placementId":"123"}`,
 	`{"aid":123, "placementId":"123", "siteId":"321"}`,
 }
diff --git a/adapters/adtelligent/adtelligent.go b/adapters/adtelligent/adtelligent.go
index 492de0a364b..3bc27a2e604 100644
--- a/adapters/adtelligent/adtelligent.go
+++ b/adapters/adtelligent/adtelligent.go
@@ -187,7 +187,13 @@ func validateImpression(imp *openrtb2.Imp) (int, error) {
 
 	imp.Ext = impExtBuffer
 
-	return impExt.SourceId, nil
+	aid, err := impExt.SourceId.Int64()
+	if err != nil {
+		return 0, &errortypes.BadInput{
+			Message: fmt.Sprintf("ignoring imp id=%s, aid parsing err: %s", imp.ID, err),
+		}
+	}
+	return int(aid), nil
 }
 
 // Builder builds a new instance of the Adtelligent adapter for the given bidder with the given config.
diff --git a/adapters/adtelligent/adtelligenttest/supplemental/wrong-impression-ext.json b/adapters/adtelligent/adtelligenttest/supplemental/wrong-impression-ext.json
index 63c587ed742..ee59cf36439 100644
--- a/adapters/adtelligent/adtelligenttest/supplemental/wrong-impression-ext.json
+++ b/adapters/adtelligent/adtelligenttest/supplemental/wrong-impression-ext.json
@@ -19,7 +19,7 @@
 
   "expectedMakeRequestsErrors": [
     {
-      "value": "ignoring imp id=unsupported-native-imp, error while decoding impExt, err: json: cannot unmarshal string into Go struct field ExtImpAdtelligent.aid of type int",
+      "value": "ignoring imp id=unsupported-native-imp, error while decoding impExt, err: json: invalid number literal, trying to unmarshal \"\\\"some string instead of int\\\"\" into Number",
       "comparison": "literal"
     }
   ]
diff --git a/adapters/adtelligent/params_test.go b/adapters/adtelligent/params_test.go
index f86a7641af9..89fb7397795 100644
--- a/adapters/adtelligent/params_test.go
+++ b/adapters/adtelligent/params_test.go
@@ -33,16 +33,21 @@ func TestInvalidParams(t *testing.T) {
 
 	for _, invalidParam := range invalidParams {
 		if err := validator.Validate(openrtb_ext.BidderAdtelligent, json.RawMessage(invalidParam)); err == nil {
-			t.Errorf("Schema allowed unexpected params: %s", invalidParam)
+			ext := openrtb_ext.ExtImpAdtelligent{}
+			err = json.Unmarshal([]byte(invalidParam), &ext)
+			if err == nil {
+				t.Errorf("Schema allowed unexpected params: %s", invalidParam)
+			}
 		}
 	}
 }
 
 var validParams = []string{
 	`{"aid":123}`,
+	`{"aid":"123"}`,
 	`{"aid":123,"placementId":1234}`,
 	`{"aid":123,"siteId":4321}`,
-	`{"aid":123,"siteId":0,"bidFloor":0}`,
+	`{"aid":"123","siteId":0,"bidFloor":0}`,
 }
 
 var invalidParams = []string{
@@ -53,8 +58,7 @@ var invalidParams = []string{
 	`4.2`,
 	`[]`,
 	`{}`,
-	`{"aid":"123"}`,
-	`{"aid":"0"}`,
+	`{"aid":"qwerty"}`,
 	`{"aid":"123","placementId":"123"}`,
 	`{"aid":123, "placementId":"123", "siteId":"321"}`,
 }
diff --git a/openrtb_ext/imp_adtarget.go b/openrtb_ext/imp_adtarget.go
index ab6cb5642c6..aa3b6136e58 100644
--- a/openrtb_ext/imp_adtarget.go
+++ b/openrtb_ext/imp_adtarget.go
@@ -1,9 +1,11 @@
 package openrtb_ext
 
+import "encoding/json"
+
 // ExtImpAdtarget defines the contract for bidrequest.imp[i].ext.prebid.bidder.adtarget
 type ExtImpAdtarget struct {
-	SourceId    int     `json:"aid"`
-	PlacementId int     `json:"placementId,omitempty"`
-	SiteId      int     `json:"siteId,omitempty"`
-	BidFloor    float64 `json:"bidFloor,omitempty"`
+	SourceId    json.Number `json:"aid"`
+	PlacementId int         `json:"placementId,omitempty"`
+	SiteId      int         `json:"siteId,omitempty"`
+	BidFloor    float64     `json:"bidFloor,omitempty"`
 }
diff --git a/openrtb_ext/imp_adtelligent.go b/openrtb_ext/imp_adtelligent.go
index c2233209352..b13c44ea360 100644
--- a/openrtb_ext/imp_adtelligent.go
+++ b/openrtb_ext/imp_adtelligent.go
@@ -1,9 +1,11 @@
 package openrtb_ext
 
+import "encoding/json"
+
 // ExtImpAdtelligent defines the contract for bidrequest.imp[i].ext.prebid.bidder.adtelligent
 type ExtImpAdtelligent struct {
-	SourceId    int     `json:"aid"`
-	PlacementId int     `json:"placementId,omitempty"`
-	SiteId      int     `json:"siteId,omitempty"`
-	BidFloor    float64 `json:"bidFloor,omitempty"`
+	SourceId    json.Number `json:"aid"`
+	PlacementId int         `json:"placementId,omitempty"`
+	SiteId      int         `json:"siteId,omitempty"`
+	BidFloor    float64     `json:"bidFloor,omitempty"`
 }
diff --git a/static/bidder-params/adtarget.json b/static/bidder-params/adtarget.json
index 195bf2dd430..980fb623786 100644
--- a/static/bidder-params/adtarget.json
+++ b/static/bidder-params/adtarget.json
@@ -14,7 +14,10 @@
       "description": "An ID which identifies the site selling the impression"
     },
     "aid": {
-      "type": "integer",
+      "type": [
+        "integer",
+        "string"
+      ],
       "description": "An ID which identifies the channel"
     },
     "bidFloor": {
diff --git a/static/bidder-params/adtelligent.json b/static/bidder-params/adtelligent.json
index db7931e1ec0..9b241bee149 100644
--- a/static/bidder-params/adtelligent.json
+++ b/static/bidder-params/adtelligent.json
@@ -14,7 +14,10 @@
       "description": "An ID which identifies the site selling the impression"
     },
     "aid": {
-      "type": "integer",
+      "type": [
+        "integer",
+        "string"
+      ],
       "description": "An ID which identifies the channel"
     },
     "bidFloor": {