diff --git a/pom.xml b/pom.xml
index 147e4935..c564eb6d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
     <groupId>fr.acinq</groupId>
     <artifactId>bitcoin-lib_2.13</artifactId>
     <packaging>jar</packaging>
-    <version>0.42</version>
+    <version>0.43</version>
     <description>Simple Scala Bitcoin library</description>
     <url>https://github.com/ACINQ/bitcoin-lib</url>
     <name>bitcoin-lib</name>
@@ -152,12 +152,12 @@
         <dependency>
             <groupId>fr.acinq.bitcoin</groupId>
             <artifactId>bitcoin-kmp-jvm</artifactId>
-            <version>0.25.1</version>
+            <version>0.26.0</version>
         </dependency>
         <dependency>
             <groupId>fr.acinq.secp256k1</groupId>
             <artifactId>secp256k1-kmp-jni-jvm</artifactId>
-            <version>0.18.0</version>
+            <version>0.19.0</version>
         </dependency>
         <dependency>
             <groupId>org.scodec</groupId>
diff --git a/src/main/scala/fr/acinq/bitcoin/scalacompat/KotlinUtils.scala b/src/main/scala/fr/acinq/bitcoin/scalacompat/KotlinUtils.scala
index f575df8c..9917cb9a 100644
--- a/src/main/scala/fr/acinq/bitcoin/scalacompat/KotlinUtils.scala
+++ b/src/main/scala/fr/acinq/bitcoin/scalacompat/KotlinUtils.scala
@@ -101,6 +101,11 @@ object KotlinUtils {
 
   implicit def eitherkmp2either[L, R](input: fr.acinq.bitcoin.utils.Either[L, R]): Either[L, R] = if (input.isLeft) Left(input.getLeft) else Right(input.getRight)
 
+  implicit def either2keitherkmp[L, R](input: Either[L, R]): fr.acinq.bitcoin.utils.Either[L, R] = input match {
+    case Left(l) => new fr.acinq.bitcoin.utils.Either.Left[L](l).asInstanceOf[fr.acinq.bitcoin.utils.Either[L, R]]
+    case Right(r) => new fr.acinq.bitcoin.utils.Either.Right[R](r).asInstanceOf[fr.acinq.bitcoin.utils.Either[L, R]]
+  }
+
   implicit def scala2kmp(input: ScriptElt): bitcoin.ScriptElt = input match {
     case OP_PUSHDATA(data, _) => new bitcoin.OP_PUSHDATA(data)
     case _ => scriptEltMapScala2Kmp(input)
diff --git a/src/main/scala/fr/acinq/bitcoin/scalacompat/Musig2.scala b/src/main/scala/fr/acinq/bitcoin/scalacompat/Musig2.scala
index 3f7ffb59..3d7e4823 100644
--- a/src/main/scala/fr/acinq/bitcoin/scalacompat/Musig2.scala
+++ b/src/main/scala/fr/acinq/bitcoin/scalacompat/Musig2.scala
@@ -26,11 +26,7 @@ object Musig2 {
    * @param extraInput_opt (optional) additional random data.
    */
   def generateNonce(sessionId: ByteVector32, signingKey: Either[PrivateKey, PublicKey], publicKeys: Seq[PublicKey], message_opt: Option[ByteVector32], extraInput_opt: Option[ByteVector32]): (SecretNonce, IndividualNonce) = {
-    val (privateKey, publicKey) = signingKey match {
-      case Left(priv) => (scala2kmp(priv), priv.publicKey)
-      case Right(pub) => (null, pub)
-    }
-    val nonce = fr.acinq.bitcoin.crypto.musig2.Musig2.generateNonce(sessionId, privateKey, publicKey, publicKeys.map(scala2kmp).asJava, message_opt.map(scala2kmp).orNull, extraInput_opt.map(scala2kmp).orNull)
+    val nonce = fr.acinq.bitcoin.crypto.musig2.Musig2.generateNonce(sessionId, either2keitherkmp(signingKey.map(scala2kmp).left.map(scala2kmp)), publicKeys.map(scala2kmp).asJava, message_opt.map(scala2kmp).orNull, extraInput_opt.map(scala2kmp).orNull)
     (nonce.getFirst, nonce.getSecond)
   }