diff --git a/versions-common/src/main/java/org/codehaus/mojo/versions/api/PomHelper.java b/versions-common/src/main/java/org/codehaus/mojo/versions/api/PomHelper.java
index b3e19123bb..c52a8b8f75 100644
--- a/versions-common/src/main/java/org/codehaus/mojo/versions/api/PomHelper.java
+++ b/versions-common/src/main/java/org/codehaus/mojo/versions/api/PomHelper.java
@@ -23,13 +23,12 @@
 import javax.xml.stream.XMLStreamException;
 import javax.xml.stream.events.XMLEvent;
 
-import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
-import java.io.InputStreamReader;
 import java.io.Reader;
 import java.io.StringReader;
 import java.io.UncheckedIOException;
+import java.nio.charset.Charset;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
@@ -142,8 +141,7 @@ public static Model getRawModel(MavenProject project) throws IOException {
      * @throws IOException if the file is not found or if the file does not parse.
      */
     public static Model getRawModel(File moduleProjectFile) throws IOException {
-        try (Reader reader =
-                new BufferedReader(new InputStreamReader(Files.newInputStream(moduleProjectFile.toPath())))) {
+        try (Reader reader = Files.newBufferedReader(moduleProjectFile.toPath(), Charset.defaultCharset())) {
             Model result = getRawModel(reader);
             result.setPomFile(moduleProjectFile);
             return result;
diff --git a/versions-common/src/main/java/org/codehaus/mojo/versions/utils/CoreExtensionUtils.java b/versions-common/src/main/java/org/codehaus/mojo/versions/utils/CoreExtensionUtils.java
index 64564dfe56..3bd45df37d 100644
--- a/versions-common/src/main/java/org/codehaus/mojo/versions/utils/CoreExtensionUtils.java
+++ b/versions-common/src/main/java/org/codehaus/mojo/versions/utils/CoreExtensionUtils.java
@@ -16,10 +16,9 @@
  * limitations under the License.
  */
 
-import java.io.BufferedReader;
 import java.io.IOException;
-import java.io.InputStreamReader;
 import java.io.Reader;
+import java.nio.charset.Charset;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.stream.Stream;
@@ -52,7 +51,7 @@ public static Stream<Extension> getCoreExtensions(MavenProject project) throws I
             return Stream.empty();
         }
 
-        try (Reader reader = new BufferedReader(new InputStreamReader(Files.newInputStream(extensionsFile)))) {
+        try (Reader reader = Files.newBufferedReader(extensionsFile, Charset.defaultCharset())) {
             return new CoreExtensionsXpp3Reader()
                     .read(reader).getExtensions().stream().map(ex -> ExtensionBuilder.newBuilder()
                             .withGroupId(ex.getGroupId())