diff --git a/core/src/main/java/com/dogecoin/dogecoinj/protocols/payments/PaymentSession.java b/core/src/main/java/com/dogecoin/dogecoinj/protocols/payments/PaymentSession.java
index d2addf4d..c26ec487 100644
--- a/core/src/main/java/com/dogecoin/dogecoinj/protocols/payments/PaymentSession.java
+++ b/core/src/main/java/com/dogecoin/dogecoinj/protocols/payments/PaymentSession.java
@@ -292,7 +292,7 @@ public class PaymentSession {
     }
 
     /**
-     * Returns a {@link Wallet.SendRequest} suitable for broadcasting to the network.
+     * Returns a SendRequest suitable for broadcasting to the network.
      */
     public SendRequest getSendRequest() {
         Transaction tx = new Transaction(params);
diff --git a/core/src/main/java/org/bitcoinj/core/AltcoinBlock.java b/core/src/main/java/org/bitcoinj/core/AltcoinBlock.java
index f35bb2b1..6688c865 100644
--- a/core/src/main/java/org/bitcoinj/core/AltcoinBlock.java
+++ b/core/src/main/java/org/bitcoinj/core/AltcoinBlock.java
@@ -39,7 +39,8 @@ import org.libdohj.params.AbstractLitecoinParams;
  * It records a set of {@link Transaction}s together with some data that links it into a place in the global block
  * chain, and proves that a difficult calculation was done over its contents. See
  * <a href="http://www.bitcoin.org/bitcoin.pdf">the Bitcoin technical paper</a> for
- * more detail on blocks. <p/>
+ * more detail on blocks.
+ * </p>
  *
  * To get a block, you can either build one from the raw bytes you can get from another implementation, or request one
  * specifically using {@link Peer#getBlock(Sha256Hash)}, or grab one from a downloaded {@link BlockChain}.
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 2c2bbe5f..be280bec 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.5-bin.zip