diff --git a/100_core/.classpath b/100_core/.classpath
index cc02e2def..51b709cbc 100644
--- a/100_core/.classpath
+++ b/100_core/.classpath
@@ -3,7 +3,7 @@
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="src" path="tst"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
-	<classpathentry kind="lib" path="lib/commons-compress-1.5.jar"/>
+	<classpathentry kind="lib" path="lib/commons-compress-1.18.jar"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry kind="lib" path="lib/xz-1.5.jar"/>
 	<classpathentry kind="lib" path="lib/Saxon-HE-9.9.1-2.jar"/>
diff --git a/res/bin/any/java/apache/commons-compress-1.18.jar b/res/bin/any/java/apache/commons-compress-1.18.jar
new file mode 100644
index 000000000..e401046b5
Binary files /dev/null and b/res/bin/any/java/apache/commons-compress-1.18.jar differ
diff --git a/res/bin/any/java/apache/commons-compress-1.5.jar b/res/bin/any/java/apache/commons-compress-1.5.jar
deleted file mode 100644
index 0239414e8..000000000
Binary files a/res/bin/any/java/apache/commons-compress-1.5.jar and /dev/null differ
diff --git a/res/dev/make/ant/xowa_compile.xml b/res/dev/make/ant/xowa_compile.xml
index 9309afc9a..1a6fe24ec 100644
--- a/res/dev/make/ant/xowa_compile.xml
+++ b/res/dev/make/ant/xowa_compile.xml
@@ -16,7 +16,7 @@
         <javac includeantruntime="false" target="${jdk}" source="${jdk}" sourcepath="" 
 		  srcdir   ="${root_dir}/src/100_core"
 		  destdir  ="${root_dir}/src/100_core/bin"
-		  classpath="${root_dir}/src/lib/junit.jar:${root_dir}/bin/any/java/apache/commons-compress-1.5.jar:${root_dir}/bin/any/java/xz/xz-1.5.jar:${root_dir}/bin/any/java/vnu/Saxon-HE-9.9.1-2.jar">
+		  classpath="${root_dir}/src/lib/junit.jar:${root_dir}/bin/any/java/apache/commons-compress-1.18.jar:${root_dir}/bin/any/java/xz/xz-1.5.jar:${root_dir}/bin/any/java/vnu/Saxon-HE-9.9.1-2.jar">
           <include name="**/*.java"/>
         </javac>
     </target>
diff --git a/res/dev/make/ant/xowa_make_jar.xml b/res/dev/make/ant/xowa_make_jar.xml
index 25fc71044..4a0b9bf3d 100644
--- a/res/dev/make/ant/xowa_make_jar.xml
+++ b/res/dev/make/ant/xowa_make_jar.xml
@@ -4,7 +4,7 @@
         <jar destfile="${xowa_jar_path}">
             <manifest>
                 <attribute name="Main-Class" value="gplx.xowa.Xowa_main"/>
-                <attribute name="Class-Path" value=". bin/${plat_name}/swt/swt.jar bin/any/java/apache/commons-compress-1.5.jar bin/any/java/jdbc/sqlite/sqlite-jdbc-3.18.0.jar bin/any/java/luaj/luaj_xowa.jar bin/any/java/jtidy/jtidy_xowa.jar bin/any/java/xz/xz-1.5.jar bin/any/java/icu4j/icu4j-57_1.jar bin/any/java/lucene/5.3.0.drd/lucene-core-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-highlighter-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-memory-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-queryparser-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-analyzers-common-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-queries-5.3.0-mobile-2.jar bin/any/java/vnu/vnu.jar bin/any/java/vnu/Saxon-HE-9.9.1-2.jar"/>
+                <attribute name="Class-Path" value=". bin/${plat_name}/swt/swt.jar bin/any/java/apache/commons-compress-1.18.jar bin/any/java/jdbc/sqlite/sqlite-jdbc-3.18.0.jar bin/any/java/luaj/luaj_xowa.jar bin/any/java/jtidy/jtidy_xowa.jar bin/any/java/xz/xz-1.5.jar bin/any/java/icu4j/icu4j-57_1.jar bin/any/java/lucene/5.3.0.drd/lucene-core-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-highlighter-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-memory-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-queryparser-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-analyzers-common-5.3.0-mobile-2.jar bin/any/java/lucene/5.3.0.drd/lucene-queries-5.3.0-mobile-2.jar bin/any/java/vnu/vnu.jar bin/any/java/vnu/Saxon-HE-9.9.1-2.jar"/>
             </manifest>
             <fileset dir="${root_dir}/src/baselib/bin"/>
             <fileset dir="${root_dir}/src/100_core/bin"/>
diff --git a/res/dev/make/maven/build.xml b/res/dev/make/maven/build.xml
index 83c88ad0b..ac71a4f2e 100644
--- a/res/dev/make/maven/build.xml
+++ b/res/dev/make/maven/build.xml
@@ -4,7 +4,7 @@
         <jar destfile="./xowa_maven.jar">
             <manifest>
                 <attribute name="Main-Class" value="gplx.xowa.Xowa_main"/>
-                <attribute name="Class-Path" value=". bin/${plat_name}/swt/swt.jar bin/any/java/apache/commons-compress-1.5.jar bin/any/java/jdbc/sqlite/sqlite-jdbc-3.18.0.jar bin/any/java/luaj/luaj_xowa.jar bin/any/java/jtidy/jtidy_xowa.jar bin/any/java/vnu/vnu.jar bin/any/java/vnu/Saxon-HE-9.9.1-2.jar"/>
+                <attribute name="Class-Path" value=". bin/${plat_name}/swt/swt.jar bin/any/java/apache/commons-compress-1.18.jar bin/any/java/jdbc/sqlite/sqlite-jdbc-3.18.0.jar bin/any/java/luaj/luaj_xowa.jar bin/any/java/jtidy/jtidy_xowa.jar bin/any/java/vnu/vnu.jar bin/any/java/vnu/Saxon-HE-9.9.1-2.jar"/>
             </manifest>
             <fileset dir="target/classes/"/>
         </jar>