diff --git a/modules/equativBidAdapter.js b/modules/equativBidAdapter.js
index 0f6648fc509..d1eaf9ca37e 100644
--- a/modules/equativBidAdapter.js
+++ b/modules/equativBidAdapter.js
@@ -339,6 +339,7 @@ export const converter = ortbConverter({
     if (pid) {
       deepSetValue(req, 'user.buyeruid', pid);
     }
+    deepSetValue(req, 'ext.equativprebidjsversion', '$prebid.version$');
 
     req = updateFeedbackData(req);
 
diff --git a/test/spec/modules/equativBidAdapter_spec.js b/test/spec/modules/equativBidAdapter_spec.js
index 32f5c05077f..8ff97ec606d 100644
--- a/test/spec/modules/equativBidAdapter_spec.js
+++ b/test/spec/modules/equativBidAdapter_spec.js
@@ -473,6 +473,14 @@ describe('Equativ bid adapter tests', () => {
       getDataFromLocalStorageStub.restore();
     });
 
+     it('should pass prebid version as ext.equativprebidjsversion param', () => {
+      const request = spec.buildRequests(
+        DEFAULT_BANNER_BID_REQUESTS,
+        DEFAULT_BANNER_BIDDER_REQUEST
+      )[0];
+      expect(request.data.ext.equativprebidjsversion).to.equal('$prebid.version$');
+    });
+
     it('should build a video request properly under normal circumstances', () => {
       // ASSEMBLE
       if (FEATURES.VIDEO) {