diff --git a/src/main/java/com/sparrowwallet/drongo/ExtendedPublicKey.java b/src/main/java/com/sparrowwallet/drongo/ExtendedPublicKey.java
index 417a2ff..dada7f3 100644
--- a/src/main/java/com/sparrowwallet/drongo/ExtendedPublicKey.java
+++ b/src/main/java/com/sparrowwallet/drongo/ExtendedPublicKey.java
@@ -41,9 +41,7 @@ public class ExtendedPublicKey {
     }
 
     public String toString() {
-        StringBuilder builder = new StringBuilder();
-        builder.append(getExtendedPublicKey());
-        return builder.toString();
+        return getExtendedPublicKey();
     }
 
     public String getExtendedPublicKey() {
diff --git a/src/main/java/com/sparrowwallet/drongo/OutputDescriptor.java b/src/main/java/com/sparrowwallet/drongo/OutputDescriptor.java
index 30a0f86..fd2cff2 100644
--- a/src/main/java/com/sparrowwallet/drongo/OutputDescriptor.java
+++ b/src/main/java/com/sparrowwallet/drongo/OutputDescriptor.java
@@ -8,7 +8,6 @@ import com.sparrowwallet.drongo.protocol.ScriptChunk;
 import com.sparrowwallet.drongo.protocol.ScriptOpCodes;
 import com.sparrowwallet.drongo.protocol.ScriptType;
 
-import java.security.KeyPair;
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;