diff --git a/src/main/java/de/dentrassi/rpm/builder/RpmUnpackMojo.java b/src/main/java/de/dentrassi/rpm/builder/RpmUnpackMojo.java
index a44cc8d..009a775 100644
--- a/src/main/java/de/dentrassi/rpm/builder/RpmUnpackMojo.java
+++ b/src/main/java/de/dentrassi/rpm/builder/RpmUnpackMojo.java
@@ -10,7 +10,6 @@
 
 import java.io.BufferedInputStream;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -171,15 +170,12 @@ public void execute() throws MojoExecutionException, MojoFailureException {
         }
 
         try (final RpmInputStream in =
-                     new RpmInputStream(new BufferedInputStream(new FileInputStream(this.rpmFile)))) {
+                     new RpmInputStream(new BufferedInputStream(Files.newInputStream(this.rpmFile.toPath())))) {
             final InputHeader<RpmTag> header = in.getPayloadHeader();
-            header.getEntry(RpmTag.FILE_GROUPNAME);
-            header.getEntry(RpmTag.FILE_USERNAME);
-
             final CpioArchiveInputStream cpio = in.getCpioStream();
             CpioArchiveEntry entry;
 
-            while ((entry = cpio.getNextCPIOEntry()) != null) {
+            while ((entry = cpio.getNextEntry()) != null) {
                 unpackEntry(header, cpio, entry, targetDir);
             }
         } catch (final IllegalArgumentException | IllegalStateException e) {
diff --git a/src/main/java/de/dentrassi/rpm/builder/Script.java b/src/main/java/de/dentrassi/rpm/builder/Script.java
index d5bcdd7..1f6d5e7 100644
--- a/src/main/java/de/dentrassi/rpm/builder/Script.java
+++ b/src/main/java/de/dentrassi/rpm/builder/Script.java
@@ -11,11 +11,11 @@
 package de.dentrassi.rpm.builder;
 
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
 
 import com.google.common.base.Strings;
 import com.google.common.io.CharStreams;
@@ -61,7 +61,7 @@ public String makeScriptContent() throws IOException {
         }
 
         if (this.file != null) {
-            try (Reader reader = new InputStreamReader(new FileInputStream(this.file), StandardCharsets.UTF_8)) {
+            try (Reader reader = new InputStreamReader(Files.newInputStream(this.file.toPath()), StandardCharsets.UTF_8)) {
                 return CharStreams.toString(reader);
             }
         }
diff --git a/src/main/java/de/dentrassi/rpm/builder/SigningHelper.java b/src/main/java/de/dentrassi/rpm/builder/SigningHelper.java
index 8202896..8700e33 100644
--- a/src/main/java/de/dentrassi/rpm/builder/SigningHelper.java
+++ b/src/main/java/de/dentrassi/rpm/builder/SigningHelper.java
@@ -10,9 +10,9 @@
  *******************************************************************************/
 package de.dentrassi.rpm.builder;
 
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.file.Files;
 
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.MojoFailureException;
@@ -46,7 +46,7 @@ public static PGPPrivateKey loadKey(final Signature signature, final Logger logg
             throw new MojoFailureException(signature, "'passphrase' parameter not set", "Signing requires the 'passphrase' parameter to be set.");
         }
 
-        try (InputStream input = new FileInputStream(signature.getKeyringFile())) {
+        try (InputStream input = Files.newInputStream(signature.getKeyringFile().toPath())) {
             final PGPPrivateKey privateKey = PgpHelper.loadPrivateKey(input, signature.getKeyId(), signature.getPassphrase());
             if (privateKey == null) {
                 throw new MojoFailureException(String.format("Unable to load GPG key '%s' from '%s'", signature.getKeyId(), signature.getKeyringFile()));
diff --git a/src/main/java/de/dentrassi/rpm/builder/YumMojo.java b/src/main/java/de/dentrassi/rpm/builder/YumMojo.java
index 91dade9..87dc527 100644
--- a/src/main/java/de/dentrassi/rpm/builder/YumMojo.java
+++ b/src/main/java/de/dentrassi/rpm/builder/YumMojo.java
@@ -191,7 +191,7 @@ public void execute() throws MojoExecutionException, MojoFailureException {
             }
 
             if (this.files != null) {
-                paths.addAll(this.files.stream().map(f -> f.toPath()).collect(Collectors.toList()));
+                paths.addAll(this.files.stream().map(File::toPath).collect(Collectors.toList()));
             }
             if (this.directories != null) {
                 for (final File dir : this.directories) {
@@ -245,7 +245,7 @@ private void addSinglePackage(final Path path, final Context context) throws IOE
 
             try (CpioArchiveInputStream cpio = ris.getCpioStream()) {
                 CpioArchiveEntry cpioEntry;
-                while ((cpioEntry = cpio.getNextCPIOEntry()) != null) {
+                while ((cpioEntry = cpio.getNextEntry()) != null) {
                     providedFiles.add(RpmInformations.normalize(cpioEntry.getName()));
                 }
             }