diff --git a/Changes.txt b/CHANGELOG.md
similarity index 54%
rename from Changes.txt
rename to CHANGELOG.md
index d3c2c7f..f982d2d 100644
--- a/Changes.txt
+++ b/CHANGELOG.md
@@ -1,37 +1,59 @@
-Changelog
-==========
-
-- 1.8: June 22, 2015
-    - Used 'codesign' to sign "Sequence Matrix.app" as this might prevent
-      it from being recognized on MacOS X systems.
-       - Thanks to Shiyu Phan for this suggestion!
-
-- 1.7.9 
-    - Turned off displaying 'N's in the display, as we don't re-export
-      those anyway.
-    - Fixed a bug in the Cluster tool reported by Michael Balke: single
-      species without conspecific sequences in the dataset were being
-      reported as 'Split'.
-
-- 1.7.8
-    - Added DOI to the citation for Sequence Matrix.
-
-- 1.7.7-dev4
-    - Naked Nexus now replaces all non-alphanumeric characters with underscores.
-
-- 1.7.7-dev3 
-    - Fixed a minor bug with clustering in which the "% of valid comparisons
-      above the threshold" number was always 0%.
-    - Fixed a bug in which multiple "Cluster" analyses in the same session
-      caused the ProgressDialog to never close, resulting in the program
-      getting "stuck" and a forced quit becoming necessary.
-
-- 1.7.7-dev2 
-    - Rewrote SpeciesDetails to remove the old, bug-ridden algorithm.
-      The new one will probably actually work.
-    - Added discrimination between "Split only", "Lumped/Split" and
-      "Lumped" for clusters in Cluster.
-
-- 1.7.6 (June 6, 2010)
-    - Added code to detect overlapping codonsets on input (#19).
-    - Fixed a bug relating to TNT files exported into directory (#55).
+# Changelog
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [v1.9]: May 14, 2021
+- Replaced Ant-based build process with Maven build.
+- Changed minimum Java version from 1.8 to 11.
+- Consolidated all shared code into TaxonDNA.Common.
+- Added memory information in the SequenceMatrix About dialog box.
+- Added Spotless for code style checking.
+
+- [v1.8.2]: April 17, 2020
+- Updated Java version from 1.5 to 1.8. No Mac application is available for this release, but I'll try to fix that in #70 before the next release. You can run the JAR file on macOS by opening the Terminal and running:
+
+- [v1.8.1]: April 17, 2020
+
+- [v1.8]: June 22, 2015
+    - Used 'codesign' to sign "Sequence Matrix.app" as this might prevent
+      it from being recognized on MacOS X systems.
+       - Thanks to Shiyu Phan for this suggestion!
+
+- 1.7.9 
+    - Turned off displaying 'N's in the display, as we don't re-export
+      those anyway.
+    - Fixed a bug in the Cluster tool reported by Michael Balke: single
+      species without conspecific sequences in the dataset were being
+      reported as 'Split'.
+
+- 1.7.8
+    - Added DOI to the citation for Sequence Matrix.
+
+- 1.7.7-dev4
+    - Naked Nexus now replaces all non-alphanumeric characters with underscores.
+
+- 1.7.7-dev3 
+    - Fixed a minor bug with clustering in which the "% of valid comparisons
+      above the threshold" number was always 0%.
+    - Fixed a bug in which multiple "Cluster" analyses in the same session
+      caused the ProgressDialog to never close, resulting in the program
+      getting "stuck" and a forced quit becoming necessary.
+
+- 1.7.7-dev2 
+    - Rewrote SpeciesDetails to remove the old, bug-ridden algorithm.
+      The new one will probably actually work.
+    - Added discrimination between "Split only", "Lumped/Split" and
+      "Lumped" for clusters in Cluster.
+
+- 1.7.6 (June 6, 2010)
+    - Added code to detect overlapping codonsets on input (#19).
+    - Fixed a bug relating to TNT files exported into directory (#55).
+
+[Unreleased]: https://github.com/gaurav/taxondna/compare/v1.9...HEAD
+[v1.9]: https://github.com/gaurav/taxondna/compare/v1.8.2...v1.9
+[v1.8.2]: https://github.com/gaurav/taxondna/compare/v1.8.1...v1.8.2
+[v1.8.1]: https://github.com/gaurav/taxondna/compare/v1.8...v1.8.1
+[1.8]: https://github.com/gaurav/taxondna/releases/tag/1.8
diff --git a/build.xml b/build.xml
deleted file mode 100644
index 6bbd997..0000000
--- a/build.xml
+++ /dev/null
@@ -1,241 +0,0 @@
-<project default = "compile">
-	<property name =        "build.dir"      location = "build"    />
-	<property file =        "version.txt" />
-
-	<!-- compile-time options -->
-        <!-- Until TaxonDNA 1.5, code was written to target JRE 1.4. Since then,
-             we target JRE 1.5 instead. If you'd like to backport TaxonDNA to
-             JRE 1.4 (in order to support MacOS X 10.3, for instance), flip this
-             variable and fix all the issues which come up.
-        -->
-        <property name = "java.targetversion" value = "1.5" />
-
-        <!-- 
-            files.common: (Common) files used by all the TaxonDNA tools
-            This is used to determine which files to package into the
-            JAR files.
-        -->
-        <property name = "files.common"
-            value = "**/Common/**, **/DNA/**, **/Others/**, **/UI/**"
-        />
-	
-    <!--
-        Targets begin here.
-    -->
-
-	<!-- 
-        compile:
-            Compile will recompile all our Java code into Java classes
-            in one shot
-    -->
-	<target name = "compile">
-		<javac
-			srcdir =        "src"
-			debug =         "yes" 
-			optimize =      "yes" 
-			deprecation =   "yes" 
-			source =        "${java.targetversion}"
-			target =        "${java.targetversion}"
-			destdir =       "${build.dir}/classes"
-                        includeAntRuntime = "no"
-		>
-			<compilerarg value = "-Xlint:unchecked" />
-		</javac>
-	</target>
-
-	<!-- 
-        src:
-            Zips up the ENTIRE directory into one
-			file for a full-source backup.
-	-->
-	<target name = "src">
-		<!-- Warning: This will fail unless we are in a directory called 'TaxonDNA' -->
-		<zip
-			destfile =      "../TaxonDNA-src-${taxondna.version}.zip"
-			basedir =       "../"
-			includes =      "TaxonDNA/**"
-			excludes =      "**/.svn, **/.git, TaxonDNA/Releases"
-			comment =       "(c) Gaurav Vaidya, 2006, 2009, 2010"
-		/>
-        <move 
-            file = "../TaxonDNA-src-${taxondna.version}.zip"
-            todir = "Releases"
-        />
-	</target>
-
-	<!--
-        javadocs:
-            Recompiles the JavaDocs (in Documentation/Javadocs)
-    -->
-	<target name = "javadocs"   depends = "compile">
-		<javadoc
-			packagenames =  "com.ggvaidya.TaxonDNA.*"
-			sourcepath =    "."
-			source =        "${java.version}"
-			destdir =       "Documentation/Javadocs/"
-		/>
-	</target>
-
-	<!--
-        clean:
-            Cleans up the build path
-    -->
-	<target name = "clean">
-		<delete     dir = "${build.dir}"            />
-		<mkdir      dir = "${build.dir}"            />
-		<mkdir      dir = "${build.dir}/classes"    />
-	</target>
-
-	<!--
-        rebuild:
-            Cleans the build path, then generates a build
-    -->
-	<target name = "rebuild"    depends = "clean, build">
-	</target>
-
-	<!-- 
-        build:
-            Prepares ChangeLog and Readme files.
-			This is also the most convenient way to
-			ensure that all Jars are built
-
-			Does NOT make a final zip. 'release' does that.
-	-->
-	<target name = "build" depends = "SpeciesIdentifier,SequenceMatrix,GenBankExplorer">
-	</target>
-
-	<!-- SpeciesIdentifier:		Builds the Jar file for SpeciesIdentifier -->
-	<target name = "SpeciesIdentifier"      depends = "compile">
-		<jar
-			destfile =  "Release/SpeciesIdentifier/SpeciesIdentifier.jar"
-			basedir =   "${build.dir}/classes"
-			includes =  "${files.common}, **/SpeciesIdentifier/**"
-		>
-			<manifest>
-				<attribute name = "Main-Class"  value = "com.ggvaidya.TaxonDNA.SpeciesIdentifier.SpeciesIdentifier" />
-			</manifest>
-		</jar>
-	</target>
-
-	<!-- SequenceMatrix:		Builds the Jar file for SequenceMatrix -->
-	<target name = "SequenceMatrix"         depends = "compile">
-		<jar
-			destfile =  "Release/SequenceMatrix/SequenceMatrix.jar"
-			basedir =   "${build.dir}/classes"
-			includes =  "${files.common}, **/SequenceMatrix/**"
-		>
-			<manifest>
-				<attribute name = "Main-Class"  value = "com.ggvaidya.TaxonDNA.SequenceMatrix.SequenceMatrix" />
-			</manifest>
-		</jar>
-	</target>
-
-	<!-- GenBankExplorer:		Builds the Jar file for GenBankExplorer -->
-	<target name = "GenBankExplorer"        depends = "compile">
-		<jar
-			destfile =  "Release/GenBankExplorer.jar"
-			basedir =   "${build.dir}/classes"
-			includes =  "${files.common}, **/GenBankExplorer/**"
-		>
-			<manifest>
-				<attribute name = "Main-Class"  value = "com.ggvaidya.TaxonDNA.GenBankExplorer.GenBankExplorer" />
-			</manifest>
-		</jar>
-	</target>
-
-    <!-- SequenceMatrix.app:        Creates an .app for Sequence Matrix -->
-    <target name = "SequenceMatrix.app"     depends = "build">
-        <copy 
-            file = "Release/SequenceMatrix/SequenceMatrix.jar"
-            todir = "Release/SequenceMatrix/MacOSX/Sequence Matrix.app/Contents/Resources/Java"
-        />
-    </target>
-
-    <!-- DClusters:          Builds the release folder for DistClus -->
-    <target name = "DClusters"       depends = "compile">
-        <jar
-            destfile =  "Release/DClusters.jar"
-            basedir =   "${build.dir}/classes"
-            includes =  "${files.common}, **/DClusters/**"
-        >
-            <manifest>
-                <attribute name = "Main-Class" value = "com.ggvaidya.TaxonDNA.DClusters.DClusters" />
-            </manifest>
-        </jar>
-    </target>
-
-	<!-- 
-        release: Release both Species Identifier and Sequence Matrix at once
-    -->
-	<target name = "release"    depends = "SeqMat_release, SpecId_release, DClusters">
-    </target>
-
-    <!--
-        SpecId_release: Release Species Identifier only.
-    -->
-    <target name = "SpecId_release" depends = "build">
-        <copy file="Changes.txt" overwrite="yes" todir="Release/SpeciesIdentifier" />
-        <zip
-	        destfile =      "../SpeciesIdentifier-${taxondna.version}.zip"
-	        basedir =       "Release/SpeciesIdentifier"
-	    	comment =       "(c) Gaurav Vaidya, 2007, 2009, 2010"
-	    	update =        "false"
-	    />
-        <move
-            file="../SpeciesIdentifier-${taxondna.version}.zip"
-            todir="Releases"
-        />
-    </target>
-
-    <!--
-        SeqMat_release: Release Sequence Matrix only.
-    -->
-    <target name = "SeqMat_release" depends = "build, SequenceMatrix.app">
-        <copy file="Changes.txt" overwrite="yes" todir="Release/SequenceMatrix/Windows" />
-        <copy file="Changes.txt" overwrite="yes" todir="Release/SequenceMatrix/MacOSX" />
-        <copy 
-            file="Release/SequenceMatrix/SequenceMatrix.jar"
-            todir="Release/SequenceMatrix/Windows" />
-        <zip 
-	        destfile =      "../SequenceMatrix-Windows-${taxondna.version}.zip"
-	        basedir =       "Release/SequenceMatrix/Windows"
-	    	comment =       "(c) Gaurav Vaidya, 2007, 2009, 2010"
-	    	update =        "false"
-	    />
-        <move file = "../SequenceMatrix-Windows-${taxondna.version}.zip" todir = "Releases" />
-        <delete
-            dir="Releases/SequenceMatrix-MacOSX-${taxondna.version}"
-            quiet="yes"
-        /><!-- quiet -> don't complain if the folder doesn't exist (it probably won't anyway) -->
-        <mkdir dir="Releases/SequenceMatrix-MacOSX-${taxondna.version}" />
-        <copy overwrite="yes" todir="Releases/SequenceMatrix-MacOSX-${taxondna.version}">
-            <fileset dir="Release/SequenceMatrix/MacOSX" />
-        </copy>
-        <chmod
-            file="Releases/SequenceMatrix-MacOSX-${taxondna.version}/Sequence Matrix.app/Contents/MacOS/JavaApplicationStub"
-            perm="755"
-        />
-        <!-- It's now up to you to compress this -->
-	</target>
-
-    <!--
-            NetBeans needs targets for running specific programs. Can't say
-            that's a bad idea.
-    -->
-    <target name="run_spid" depends="SpeciesIdentifier">
-        <java jar="Release/SpeciesIdentifier/SpeciesIdentifier.jar" maxmemory="2048m" fork="true">
-        </java>
-    </target>
-    <target name="run_seqmat" depends="SequenceMatrix">
-        <java jar="Release/SequenceMatrix/SequenceMatrix.jar" maxmemory="2048m" fork="true">
-        </java>
-    </target>
-    <target name="run_gbx" depends="GenBankExplorer">
-        <java jar="Release/GenBankExplorer.jar" maxmemory="2048m" fork="true">
-        </java>
-    </target>
-    <target name="run_dclusters" depends="DClusters">
-        <java jar="Release/DClusters.jar" maxmemory="2048m" fork="true" />
-    </target>
-        
-</project>
diff --git a/pom.xml b/pom.xml
index c36eeb4..8264153 100644
--- a/pom.xml
+++ b/pom.xml
@@ -15,7 +15,7 @@
 
   <groupId>com.ggvaidya</groupId>
   <artifactId>TaxonDNA</artifactId>
-  <version>1.9-SNAPSHOT</version>
+  <version>1.9</version>
 
   <name>TaxonDNA</name>
   <description>Taxonomy-aware DNA sequence processing toolkit.</description>