diff --git a/src/main/scala/org/bitcoins/core/crypto/CryptoParams.scala b/src/main/scala/org/bitcoins/core/crypto/CryptoParams.scala
index bb20ae0002..1020deeb2d 100644
--- a/src/main/scala/org/bitcoins/core/crypto/CryptoParams.scala
+++ b/src/main/scala/org/bitcoins/core/crypto/CryptoParams.scala
@@ -7,7 +7,7 @@ import org.spongycastle.crypto.params.ECDomainParameters
  * Created by chris on 3/29/16.
  * This trait represents all of the default parameters for our elliptic curve
  */
-trait CryptoParams {
+sealed abstract class CryptoParams {
 
   /** This is the parameters for the elliptic curve bitcoin uses. */
   def params = SECNamedCurves.getByName("secp256k1")
diff --git a/src/main/scala/org/bitcoins/core/crypto/DERSignatureUtil.scala b/src/main/scala/org/bitcoins/core/crypto/DERSignatureUtil.scala
index b8e18c2eca..920fa2b853 100644
--- a/src/main/scala/org/bitcoins/core/crypto/DERSignatureUtil.scala
+++ b/src/main/scala/org/bitcoins/core/crypto/DERSignatureUtil.scala
@@ -8,8 +8,9 @@ import scala.util.{Failure, Success, Try}
 /**
  * Created by chris on 3/23/16.
  */
-trait DERSignatureUtil extends BitcoinSLogger {
+sealed abstract class DERSignatureUtil {
 
+  private val logger = BitcoinSLogger.logger
   /**
    * Checks if this signature is encoded to DER correctly
    * https://crypto.stackexchange.com/questions/1795/how-can-i-convert-a-der-ecdsa-signature-to-asn-1
diff --git a/src/main/scala/org/bitcoins/core/crypto/ECDigitalSignature.scala b/src/main/scala/org/bitcoins/core/crypto/ECDigitalSignature.scala
index 049bcc707c..aa8742a755 100644
--- a/src/main/scala/org/bitcoins/core/crypto/ECDigitalSignature.scala
+++ b/src/main/scala/org/bitcoins/core/crypto/ECDigitalSignature.scala
@@ -4,7 +4,8 @@ import org.bitcoins.core.util.{BitcoinSLogger, BitcoinSUtil, Factory}
 /**
  * Created by chris on 2/26/16.
  */
-sealed trait ECDigitalSignature extends BitcoinSLogger {
+sealed abstract class ECDigitalSignature {
+  private val logger = BitcoinSLogger.logger
 
   def hex : String = BitcoinSUtil.encodeHex(bytes)