diff --git a/README.md b/README.md
index e205cfb..cb7dd49 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ java -jar mc-resource-analyzer-x.x.x.jar [-hHmsStV] [-B=PATH] [-M=PATH] [-o=STRI
 - `-s`, `--statistics`: Outputs a file with statistics about the analysis.
 - `-o`, `--output-prefix`: Use this argument to add a prefix to the program's output files. For example, using `-o abc` would result in the files `abc.csv` and `abc_table.html`.
 - `-v`, `--version-select`: Use this argument if you want to analyze a world that was not generated with the latest version of Minecraft. Selecting a version that does not match the version with which the regions were generated may result in unexpected behavior. The following versions are supported:
-  - `ANVIL_118` for 1.18
+  - `ANVIL_118` for 1.18 to 1.20
   - `ANVIL_2021` for 1.16 to 1.17
   - `ANVIL_2018` for 1.13 to 1.15
   - `ANVIL_2012` for 1.2 to 1.12
@@ -46,7 +46,7 @@ java -jar mc-resource-analyzer-x.x.x.jar [-hHmsStV] [-B=PATH] [-M=PATH] [-o=STRI
 
 ### Version compatibility
 
-MCResourceAnalyzer 1.1.7 can analyze worlds generated with any version of Minecraft: Java Edition between Indev 0.31 20100122 and 1.18.
+MCResourceAnalyzer 1.2.0 can analyze worlds generated with any version of Minecraft: Java Edition between Indev 0.31 20100122 and 1.20.
 
 Note that Indev worlds with the `Long` and `Deep` world shapes are not supported.
 
diff --git a/pom.xml b/pom.xml
index 3ca0161..7f43e3e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,11 +3,23 @@
 
     <groupId>io.github.meeples10.mcresourceanalyzer</groupId>
     <artifactId>mc-resource-analyzer</artifactId>
-    <version>1.2.0-SNAPSHOT</version>
+    <version>1.2.0</version>
     <packaging>jar</packaging>
 
+    <name>MCResourceAnalyzer</name>
+    <url>https://github.com/Meeples10/MCResourceAnalyzer</url>
+    <description>Analyze Minecraft region files to determine the empirical distribution of block types.</description>
+    <licenses>
+        <license>
+            <name>BSD-3-Clause</name>
+            <url>https://spdx.org/licenses/BSD-3-Clause.html</url>
+        </license>
+    </licenses>
+
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <timestamp>${maven.build.timestamp}</timestamp>
+        <maven.build.timestamp.format>yyyy-MM-dd</maven.build.timestamp.format>
     </properties>
 
     <dependencies>
@@ -19,6 +31,12 @@
     </dependencies>
 
     <build>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
diff --git a/src/main/java/io/github/meeples10/mcresourceanalyzer/Main.java b/src/main/java/io/github/meeples10/mcresourceanalyzer/Main.java
index 95d1c44..b0d80d9 100644
--- a/src/main/java/io/github/meeples10/mcresourceanalyzer/Main.java
+++ b/src/main/java/io/github/meeples10/mcresourceanalyzer/Main.java
@@ -9,9 +9,7 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.nio.file.Files;
-import java.text.DateFormat;
 import java.text.DecimalFormat;
-import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -19,13 +17,13 @@
 import java.util.concurrent.TimeUnit;
 
 import picocli.CommandLine;
+import picocli.CommandLine.IVersionProvider;
 import picocli.CommandLine.Model.CommandSpec;
 import picocli.CommandLine.Model.OptionSpec;
 import picocli.CommandLine.Model.PositionalParamSpec;
 import picocli.CommandLine.ParseResult;
 
 public class Main {
-    public static final DateFormat DATE_FORMAT = new SimpleDateFormat("dd MMM yyyy 'at' hh:mm:ss a zzz");
     public static final FilenameFilter DS_STORE_FILTER = new FilenameFilter() {
         @Override
         public boolean accept(File dir, String name) {
@@ -55,6 +53,7 @@ public static void main(String[] args) {
         if(commandLine.getCommandName().equals("<main class>"))
             commandLine.setCommandName("java -jar mc-resource-analyzer-x.x.x.jar");
         if(commandLine.isUsageHelpRequested()) commandLine.usage(System.out);
+        if(commandLine.isVersionHelpRequested()) commandLine.printVersionHelp(System.out);
         if(exitCode != 0 || commandLine.isUsageHelpRequested() || commandLine.isVersionHelpRequested())
             System.exit(exitCode);
         try {
@@ -93,7 +92,15 @@ public static void main(String[] args) {
 
     private static CommandSpec createCommandSpec() {
         CommandSpec spec = CommandSpec.create();
-        spec.mixinStandardHelpOptions(true);
+        spec.mixinStandardHelpOptions(true).versionProvider(new IVersionProvider() {
+            @Override
+            public String[] getVersion() throws Exception {
+                List<String> lines = readLines(Main.class.getResourceAsStream("/version.properties"));
+                return new String[] {
+                        String.format("@|white,bold %s %s|@ @|faint %s|@", lines.get(0), lines.get(1), lines.get(2)),
+                        String.format("@|yellow %s|@", lines.get(3)) };
+            }
+        });
         spec.addOption(
                 OptionSpec.builder("-v", "--version-select").paramLabel("VERSION").type(RegionAnalyzer.Version.class)
                         .description("Selects the version with which the region files were generated.").build());
@@ -202,7 +209,6 @@ public static int[] unstream(int bitsPerValue, int wordSize, boolean slack, long
         for(int i = 0; i < data.length; i++) {
             for(int n = 0; n < wordSize; n++) {
                 int bit = (int) ((data[i] >> n) & 0x01);
-                // v = (v << 1) | bit;
                 v = (bit << bl) | v;
                 bl++;
                 if(bl >= bitsPerValue) {
@@ -251,14 +257,15 @@ private static void loadBlockNames() throws IOException {
         for(String line : readLines(Main.class.getResourceAsStream("/blocks.properties"))) {
             if(line.length() == 0) continue;
             String[] split = line.split("=", 2);
-            BLOCK_NAMES.put(split[0], split[1]);
+            if(!BLOCK_NAMES.containsKey(split[0])) BLOCK_NAMES.put(split[0], split[1]);
         }
     }
 
     private static void loadBlocksToMerge() throws IOException {
         for(String line : readLines(Main.class.getResourceAsStream("/merge.properties"))) {
             if(line.length() == 0) continue;
-            BLOCKS_TO_MERGE.add(Integer.valueOf(line.trim()));
+            int i = Integer.valueOf(line.trim());
+            if(!BLOCKS_TO_MERGE.contains(i)) BLOCKS_TO_MERGE.add(i);
         }
     }
 
diff --git a/src/main/resources/version.properties b/src/main/resources/version.properties
new file mode 100644
index 0000000..d5c9f6b
--- /dev/null
+++ b/src/main/resources/version.properties
@@ -0,0 +1,4 @@
+${project.name}
+${project.version}
+${timestamp}
+${project.url}