diff --git a/README.md b/README.md
index 76b2cec..8655b26 100644
--- a/README.md
+++ b/README.md
@@ -36,13 +36,13 @@ Artifacts are available on maven central:
 <dependency>
     <groupId>org.sheinbergon</groupId>
     <artifactId>jna-aac-encoder</artifactId>
-    <version>2.0.0</version>
+    <version>2.1.0</version>
 </dependency>
 ```
 
 **_Gradle_**
 ```groovy
-compile 'org.sheinbergon:jna-aac-encoder:2.0.0'
+compile 'org.sheinbergon:jna-aac-encoder:2.1.0'
 ```
 
 #### Additional information
@@ -51,7 +51,8 @@ compile 'org.sheinbergon:jna-aac-encoder:2.0.0'
     * Windows (64-bit)
     * OSX (Intel 64-bit / Apple Silicon, compiled with Xcode 13.3 SDK)
   * Tested with FDK-AAC version is 2.0.2
-  * Lower `2.0.x` versions of FDK-AAC might work, but haven't been tested.
+  * Earlier `2.0.x` versions of FDK-AAC might work, but haven't been tested.
+  * For JDK 8 compatibility, please use version `2.0.0` of this library
   * For `0.1.6`/`0.1.5` FDK-AAC support and Windows 32 bit support, please use version `0.1.9` of this library  
  
 ### Encoding using the JVM AudioSystem
@@ -92,7 +93,7 @@ the encoding process to fail.
 
 Additional restrictions:
   * A maximum of 6 audio input/output channels
-  * Only the AAC-LC/HE-AAC/HE-AACv2 encoding profiles are supported  
+  * Only the AAC-LC/HE-AAC/HE-AACv2 encoding profiles are supported
 
 ## Roadmap
   * Improved lower-level interface (with examples).
diff --git a/build.gradle b/build.gradle
index 3294d0e..f785b11 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,7 +16,7 @@ plugins {
 ext {
     depVersions = [
             lombok      : '1.18.30',
-            jna         : '5.12.1',
+            jna         : '5.13.0',
             commonsLang3: '3.14.0',
             jsr305      : '3.0.2'
     ]
@@ -40,7 +40,7 @@ ext {
 }
 
 group 'org.sheinbergon'
-version '2.0.0'
+version '2.1.0'
 
 repositories {
     mavenCentral()
@@ -74,7 +74,7 @@ dependencies {
     benchmarkImplementation "commons-io:commons-io:${benchmarkDepVersions.commonsIO}"
 }
 
-sourceCompatibility = JavaVersion.VERSION_1_8
+sourceCompatibility = JavaVersion.VERSION_11
 
 test {
 
@@ -105,7 +105,7 @@ jacoco {
 }
 
 checkstyle {
-    toolVersion '9.3'
+    toolVersion '10.12.5'
     configFile file("$rootDir/checkstyle.xml")
 }
 
diff --git a/src/benchmark/java/org/sheinbergon/aac/AACEncodingBenchmark.java b/src/benchmark/java/org/sheinbergon/aac/AACEncodingBenchmark.java
index 2226a2e..8622e2a 100644
--- a/src/benchmark/java/org/sheinbergon/aac/AACEncodingBenchmark.java
+++ b/src/benchmark/java/org/sheinbergon/aac/AACEncodingBenchmark.java
@@ -25,7 +25,6 @@
 import java.io.File;
 import java.io.IOException;
 import java.net.URL;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
@@ -41,12 +40,10 @@ public class AACEncodingBenchmark {
   private static final String AAC_ENC_COMMAND_TEMPLATE = AAC_ENC_BIN + " -r %d -t %d -a 1 %s %s";
 
   @SuppressWarnings("MagicNumber")
-  private static final Map<AACEncodingProfile, Float> AAC_ENCODING_PROFILE_BITRATE_FACTOR = new HashMap<AACEncodingProfile, Float>() {
-    {
-      put(AACEncodingProfile.AAC_LC, 1.5f);
-      put(AACEncodingProfile.HE_AAC, 0.625f);
-    }
-  };
+  private static final Map<AACEncodingProfile, Float> AAC_ENCODING_PROFILE_BITRATE_FACTOR = Map.of(
+      AACEncodingProfile.AAC_LC, 1.5f,
+      AACEncodingProfile.HE_AAC, 0.625f
+  );
 
   private static final AudioFileFormat.Type WAV = AudioFileFormat.Type.WAVE;
   private static final String WAV_EXT = "." + WAV.getExtension();
@@ -60,14 +57,11 @@ public class AACEncodingBenchmark {
 
   private static final String INPUT_RESOURCE_NAME = "africa-toto.wav";
 
-  private static final Map<AACEncodingProfile, AudioFileFormat.Type> ENCODING_PROFILES_TO_FILE_TYPES =
-      new HashMap<AACEncodingProfile, AudioFileFormat.Type>() {
-        {
-          put(AACEncodingProfile.AAC_LC, AACFileTypes.AAC_LC);
-          put(AACEncodingProfile.HE_AAC, AACFileTypes.AAC_HE);
-          put(AACEncodingProfile.HE_AAC_V2, AACFileTypes.AAC_HE_V2);
-        }
-      };
+  private static final Map<AACEncodingProfile, AudioFileFormat.Type> ENCODING_PROFILES_TO_FILE_TYPES = Map.of(
+      AACEncodingProfile.AAC_LC, AACFileTypes.AAC_LC,
+      AACEncodingProfile.HE_AAC, AACFileTypes.AAC_HE,
+      AACEncodingProfile.HE_AAC_V2, AACFileTypes.AAC_HE_V2
+  );
 
   /* This is manually set by each benchmark iteration. @Param annotations are not used
    * in order to allow better visualization via JMH visualizer.
diff --git a/src/main/java/org/sheinbergon/aac/encoder/AACAudioEncoder.java b/src/main/java/org/sheinbergon/aac/encoder/AACAudioEncoder.java
index 3227d01..140a1b9 100644
--- a/src/main/java/org/sheinbergon/aac/encoder/AACAudioEncoder.java
+++ b/src/main/java/org/sheinbergon/aac/encoder/AACAudioEncoder.java
@@ -23,8 +23,6 @@
 import javax.annotation.concurrent.NotThreadSafe;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
-import java.util.HashMap;
-import java.util.HashSet;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
@@ -34,16 +32,13 @@
 public final class AACAudioEncoder implements AutoCloseable {
 
   @SuppressWarnings("MagicNumber")
-  private static final Set<Integer> SAMPLE_RATES = new HashSet<Integer>() {
-    {
-      add(16000);
-      add(22050);
-      add(24000);
-      add(32000);
-      add(44100);
-      add(48000);
-    }
-  };
+  private static final Set<Integer> SAMPLE_RATES = Set.of(
+      16000,
+      22050,
+      24000,
+      32000,
+      44100,
+      48000);
 
   // Some fdk-aac internal constants
   private static final int PARAMETRIC_STEREO_CHANNEL_COUNT = 2;
@@ -107,13 +102,11 @@ public static class Builder {
      * @see <a href="https://github.com/mstorsjo/fdk-aac/blob/v0.1.6/libAACenc/include/aacenc_lib.h">fdk-aac/libAACenc/include/aacenc_lib.h</a>
      */
     @SuppressWarnings("MagicNumber")
-    private static final Map<AACEncodingProfile, Float> SAMPLES_TO_BIT_RATE_RATIO = new HashMap<AACEncodingProfile, Float>() {
-      {
-        put(AACEncodingProfile.AAC_LC, 1.5f);
-        put(AACEncodingProfile.HE_AAC, 0.625f);
-        put(AACEncodingProfile.HE_AAC_V2, 0.5f);
-      }
-    };
+    private static final Map<AACEncodingProfile, Float> SAMPLES_TO_BIT_RATE_RATIO = Map.of(
+        AACEncodingProfile.AAC_LC, 1.5f,
+        AACEncodingProfile.HE_AAC, 0.625f,
+        AACEncodingProfile.HE_AAC_V2, 0.5f
+    );
 
     // Defaults
     private boolean afterBurner = true;
diff --git a/src/main/java/org/sheinbergon/aac/sound/AACFileWriter.java b/src/main/java/org/sheinbergon/aac/sound/AACFileWriter.java
index 027ebd0..5ce5188 100644
--- a/src/main/java/org/sheinbergon/aac/sound/AACFileWriter.java
+++ b/src/main/java/org/sheinbergon/aac/sound/AACFileWriter.java
@@ -17,7 +17,6 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
@@ -29,14 +28,11 @@ public final class AACFileWriter extends AudioFileWriter {
 
   private static final int INPUT_BUFFER_MULTIPLIER = 16;
 
-  private static final Map<AudioFileFormat.Type, AACEncodingProfile> FILE_TYPES_TO_ENCODING_PROFILES =
-      new HashMap<AudioFileFormat.Type, AACEncodingProfile>() {
-        {
-          put(AACFileTypes.AAC_LC, AACEncodingProfile.AAC_LC);
-          put(AACFileTypes.AAC_HE, AACEncodingProfile.HE_AAC);
-          put(AACFileTypes.AAC_HE_V2, AACEncodingProfile.HE_AAC_V2);
-        }
-      };
+  private static final Map<AudioFileFormat.Type, AACEncodingProfile> FILE_TYPES_TO_ENCODING_PROFILES = Map.of(
+      AACFileTypes.AAC_LC, AACEncodingProfile.AAC_LC,
+      AACFileTypes.AAC_HE, AACEncodingProfile.HE_AAC,
+      AACFileTypes.AAC_HE_V2, AACEncodingProfile.HE_AAC_V2
+  );
 
   @Override
   public AudioFileFormat.Type[] getAudioFileTypes() {
diff --git a/src/test/java/org/sheinbergon/aac/MediaInfoSupport.java b/src/test/java/org/sheinbergon/aac/MediaInfoSupport.java
index 24f24a1..9e6ac85 100644
--- a/src/test/java/org/sheinbergon/aac/MediaInfoSupport.java
+++ b/src/test/java/org/sheinbergon/aac/MediaInfoSupport.java
@@ -6,8 +6,7 @@
 
 import javax.sound.sampled.AudioFormat;
 import java.io.File;
-import java.util.Arrays;
-import java.util.HashSet;
+import java.util.Set;
 
 @SuppressWarnings("MissingJavadocMethod")
 public final class MediaInfoSupport {
@@ -35,19 +34,19 @@ public static void assertAACOutput(
       final AACEncodingProfile profile) {
     boolean opened = false;
     try {
-      if (opened = MEDIA_INFO.open(aac)) {
+      if (!(opened = MEDIA_INFO.open(aac))) {
+        throw new IllegalStateException("Could not open AAC file " + aac + " via the mediainfo shared library");
+      } else {
         Assertions
             .assertEquals(EXPECTED_AUDIO_STREAMS_COUNT, MEDIA_INFO.streamCount(MediaInfoLibFacade.StreamKind.Audio));
         Assertions.assertEquals(inputFormat.getSampleRate(),
             Float.valueOf(getParam("SamplingRate")).floatValue());
         Assertions.assertEquals(inputFormat.getChannels(), Integer.valueOf(getParam("Channel(s)")).intValue());
         Assertions.assertEquals(AAC_MEDIAINFO_FORMAT, getParam("Format"));
-        Assertions.assertTrue(new HashSet<>(Arrays.asList(
+        Assertions.assertTrue(Set.of(
             getParam("Format_AdditionalFeatures"),
             getParam("Format_Commercial")
-        )).contains(profile.code()));
-      } else {
-        throw new IllegalStateException("Could not open AAC file " + aac + " via the mediainfo shared library");
+        ).contains(profile.code()));
       }
     } finally {
       if (opened) {
diff --git a/src/test/java/org/sheinbergon/aac/sound/AACFileWriterTest.java b/src/test/java/org/sheinbergon/aac/sound/AACFileWriterTest.java
index f475686..d0646d0 100644
--- a/src/test/java/org/sheinbergon/aac/sound/AACFileWriterTest.java
+++ b/src/test/java/org/sheinbergon/aac/sound/AACFileWriterTest.java
@@ -48,7 +48,7 @@ public void supportedAudioInput() throws UnsupportedAudioFileException, IOExcept
   @DisplayName("Unsupported audio input")
   public void unsupportedAudioEncoding() throws IOException {
     val aac = TestSupport.tempAACOutputFile();
-    Assertions.assertThrows(UnsupportedAudioFileException.class, () -> {
+    Assertions.assertThrows(IllegalArgumentException.class, () -> {
       try (val input = TestSupport.unsupported24bitWAVAudioInputStream()) {
         writer.write(input, AACFileTypes.AAC_LC, aac);
       } finally {