diff --git a/CHANGELOG.md b/CHANGELOG.md
index efac757..1738227 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @digitalbazaar/ecdsa-multikey ChangeLog
 
+## 1.5.0 - 2023-11-dd
+
+### Added
+- Rename `remotePublicKey` param to `publicKey` for `deriveSecret()` to get
+  better compatibility with WebKMS Client KeyAgreementKey interface. The
+  param can still be passed as `remotePublicKey` but this is considered
+  deprecated.
+
 ## 1.4.0 - 2023-11-05
 
 ### Added
diff --git a/lib/index.js b/lib/index.js
index 51420d9..e8d8a53 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -130,14 +130,20 @@ async function _createKeyPairInterface({keyPair, keyAgreement = false}) {
       const {id, publicKey} = keyPair;
       return createVerifier({id, publicKey});
     },
-    async deriveSecret({remotePublicKey} = {}) {
+    // pass `publicKey`, as `remotePublicKey` is just a backwards compatible
+    // alias
+    async deriveSecret({publicKey, remotePublicKey} = {}) {
+      if(remotePublicKey && publicKey) {
+        throw new Error(
+          'Only one of "remotePublicKey" and "publicKey" must be given.');
+      }
       if(!keyPair.keyAgreement) {
         const error = Error('"keyAgreement" is not supported by this keypair.');
         error.name = 'NotSupportedError';
         throw error;
       }
       return _deriveSecret(
-        {localKeyPair: this, remoteKeyPair: remotePublicKey});
+        {localKeyPair: this, remoteKeyPair: remotePublicKey || publicKey});
     }
   };
 
diff --git a/test/EcdsaMultikey.spec.js b/test/EcdsaMultikey.spec.js
index c056986..41ecf52 100644
--- a/test/EcdsaMultikey.spec.js
+++ b/test/EcdsaMultikey.spec.js
@@ -44,7 +44,7 @@ describe('EcdsaMultikey', () => {
 
       let err;
       try {
-        await keyPair.deriveSecret({remotePublicKey: keyPair});
+        await keyPair.deriveSecret({publicKey: keyPair});
       } catch(e) {
         err = e;
       }
@@ -58,8 +58,8 @@ describe('EcdsaMultikey', () => {
       const keyPair2 = await EcdsaMultikey.generate(
         {curve: 'P-256', keyAgreement: true});
 
-      const secret1 = await keyPair1.deriveSecret({remotePublicKey: keyPair2});
-      const secret2 = await keyPair2.deriveSecret({remotePublicKey: keyPair1});
+      const secret1 = await keyPair1.deriveSecret({publicKey: keyPair2});
+      const secret2 = await keyPair2.deriveSecret({publicKey: keyPair1});
 
       expect(secret1).to.deep.eql(secret2);
     });