diff --git a/WORKSPACE b/WORKSPACE
index 0eabeccbc..7a3cc4ecc 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -108,8 +108,8 @@ maven_jar(
 
 maven_jar(
     name = "tukaani-xz",
-    artifact = "org.tukaani:xz:1.6",
-    sha1 = "05b6f921f1810bdf90e25471968f741f87168b64",
+    artifact = "org.tukaani:xz:1.8",
+    sha1 = "c4f7d054303948eb6a4066194253886c8af07128",
 )
 
 maven_jar(
diff --git a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.10-staging.target b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.10-staging.target
index 98a2a6b0c..da1c782c2 100644
--- a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.10-staging.target
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.10-staging.target
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="jgit-4.9-staging" sequenceNumber="1544018574">
+<target name="jgit-4.9-staging" sequenceNumber="1545531343">
   <locations>
     <location includeMode="slicer" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="true" type="InstallableUnit">
       <unit id="org.eclipse.jetty.client" version="9.4.11.v20180605"/>
@@ -62,8 +62,8 @@
       <unit id="org.junit.source" version="4.12.0.v201504281640"/>
       <unit id="javax.servlet" version="3.1.0.v201410161800"/>
       <unit id="javax.servlet.source" version="3.1.0.v201410161800"/>
-      <unit id="org.tukaani.xz" version="1.6.0.v20170629-1752"/>
-      <unit id="org.tukaani.xz.source" version="1.6.0.v20170629-1752"/>
+      <unit id="org.tukaani.xz" version="1.8.0.v20180207-1613"/>
+      <unit id="org.tukaani.xz.source" version="1.8.0.v20180207-1613"/>
       <unit id="org.slf4j.api" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.api.source" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.impl.log4j12" version="1.7.2.v20131105-2200"/>
diff --git a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.5.target b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.5.target
index 10ff3bea0..4bb6e24ac 100644
--- a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.5.target
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.5.target
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="jgit-4.5" sequenceNumber="1544018556">
+<target name="jgit-4.5" sequenceNumber="1545531390">
   <locations>
     <location includeMode="slicer" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="true" type="InstallableUnit">
       <unit id="org.eclipse.jetty.client" version="9.4.11.v20180605"/>
@@ -62,8 +62,8 @@
       <unit id="org.junit.source" version="4.12.0.v201504281640"/>
       <unit id="javax.servlet" version="3.1.0.v201410161800"/>
       <unit id="javax.servlet.source" version="3.1.0.v201410161800"/>
-      <unit id="org.tukaani.xz" version="1.6.0.v20170629-1752"/>
-      <unit id="org.tukaani.xz.source" version="1.6.0.v20170629-1752"/>
+      <unit id="org.tukaani.xz" version="1.8.0.v20180207-1613"/>
+      <unit id="org.tukaani.xz.source" version="1.8.0.v20180207-1613"/>
       <unit id="org.slf4j.api" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.api.source" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.impl.log4j12" version="1.7.2.v20131105-2200"/>
diff --git a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.6.target b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.6.target
index 11fd7fd69..9a3792276 100644
--- a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.6.target
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.6.target
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="jgit-4.6" sequenceNumber="1544018561">
+<target name="jgit-4.6" sequenceNumber="1545531423">
   <locations>
     <location includeMode="slicer" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="true" type="InstallableUnit">
       <unit id="org.eclipse.jetty.client" version="9.4.11.v20180605"/>
@@ -62,8 +62,8 @@
       <unit id="org.junit.source" version="4.12.0.v201504281640"/>
       <unit id="javax.servlet" version="3.1.0.v201410161800"/>
       <unit id="javax.servlet.source" version="3.1.0.v201410161800"/>
-      <unit id="org.tukaani.xz" version="1.6.0.v20170629-1752"/>
-      <unit id="org.tukaani.xz.source" version="1.6.0.v20170629-1752"/>
+      <unit id="org.tukaani.xz" version="1.8.0.v20180207-1613"/>
+      <unit id="org.tukaani.xz.source" version="1.8.0.v20180207-1613"/>
       <unit id="org.slf4j.api" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.api.source" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.impl.log4j12" version="1.7.2.v20131105-2200"/>
diff --git a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.7.target b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.7.target
index 061439cd9..80ca7a221 100644
--- a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.7.target
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.7.target
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="jgit-4.7" sequenceNumber="1544018548">
+<target name="jgit-4.7" sequenceNumber="1545531440">
   <locations>
     <location includeMode="slicer" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="true" type="InstallableUnit">
       <unit id="org.eclipse.jetty.client" version="9.4.11.v20180605"/>
@@ -62,8 +62,8 @@
       <unit id="org.junit.source" version="4.12.0.v201504281640"/>
       <unit id="javax.servlet" version="3.1.0.v201410161800"/>
       <unit id="javax.servlet.source" version="3.1.0.v201410161800"/>
-      <unit id="org.tukaani.xz" version="1.6.0.v20170629-1752"/>
-      <unit id="org.tukaani.xz.source" version="1.6.0.v20170629-1752"/>
+      <unit id="org.tukaani.xz" version="1.8.0.v20180207-1613"/>
+      <unit id="org.tukaani.xz.source" version="1.8.0.v20180207-1613"/>
       <unit id="org.slf4j.api" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.api.source" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.impl.log4j12" version="1.7.2.v20131105-2200"/>
diff --git a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.8.target b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.8.target
index da66fb947..470d5caf8 100644
--- a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.8.target
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.8.target
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="jgit-4.8" sequenceNumber="1544018536">
+<target name="jgit-4.8" sequenceNumber="1545531452">
   <locations>
     <location includeMode="slicer" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="true" type="InstallableUnit">
       <unit id="org.eclipse.jetty.client" version="9.4.11.v20180605"/>
@@ -62,8 +62,8 @@
       <unit id="org.junit.source" version="4.12.0.v201504281640"/>
       <unit id="javax.servlet" version="3.1.0.v201410161800"/>
       <unit id="javax.servlet.source" version="3.1.0.v201410161800"/>
-      <unit id="org.tukaani.xz" version="1.6.0.v20170629-1752"/>
-      <unit id="org.tukaani.xz.source" version="1.6.0.v20170629-1752"/>
+      <unit id="org.tukaani.xz" version="1.8.0.v20180207-1613"/>
+      <unit id="org.tukaani.xz.source" version="1.8.0.v20180207-1613"/>
       <unit id="org.slf4j.api" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.api.source" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.impl.log4j12" version="1.7.2.v20131105-2200"/>
diff --git a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.9.target b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.9.target
index 025bb1fa1..7e19d35b6 100644
--- a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.9.target
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/jgit-4.9.target
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde?>
 <!-- generated with https://github.com/eclipse-cbi/targetplatform-dsl -->
-<target name="jgit-4.9" sequenceNumber="1544017335">
+<target name="jgit-4.9" sequenceNumber="1545531468">
   <locations>
     <location includeMode="slicer" includeAllPlatforms="false" includeSource="true" includeConfigurePhase="true" type="InstallableUnit">
       <unit id="org.eclipse.jetty.client" version="9.4.11.v20180605"/>
@@ -62,8 +62,8 @@
       <unit id="org.junit.source" version="4.12.0.v201504281640"/>
       <unit id="javax.servlet" version="3.1.0.v201410161800"/>
       <unit id="javax.servlet.source" version="3.1.0.v201410161800"/>
-      <unit id="org.tukaani.xz" version="1.6.0.v20170629-1752"/>
-      <unit id="org.tukaani.xz.source" version="1.6.0.v20170629-1752"/>
+      <unit id="org.tukaani.xz" version="1.8.0.v20180207-1613"/>
+      <unit id="org.tukaani.xz.source" version="1.8.0.v20180207-1613"/>
       <unit id="org.slf4j.api" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.api.source" version="1.7.2.v20121108-1250"/>
       <unit id="org.slf4j.impl.log4j12" version="1.7.2.v20131105-2200"/>
diff --git a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/orbit/R20181128170323-2018-12.tpd b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/orbit/R20181128170323-2018-12.tpd
index d5a257d1d..d447d6ca4 100644
--- a/org.eclipse.jgit.packaging/org.eclipse.jgit.target/orbit/R20181128170323-2018-12.tpd
+++ b/org.eclipse.jgit.packaging/org.eclipse.jgit.target/orbit/R20181128170323-2018-12.tpd
@@ -41,8 +41,8 @@ location "http://download.eclipse.org/tools/orbit/downloads/drops/R2018112817032
 	org.junit.source [4.12.0.v201504281640,4.12.0.v201504281640]
 	javax.servlet [3.1.0.v201410161800,3.1.0.v201410161800]
 	javax.servlet.source [3.1.0.v201410161800,3.1.0.v201410161800]
-	org.tukaani.xz [1.6.0.v20170629-1752,1.6.0.v20170629-1752]
-	org.tukaani.xz.source [1.6.0.v20170629-1752,1.6.0.v20170629-1752]
+	org.tukaani.xz [1.8.0.v20180207-1613,1.8.0.v20180207-1613]
+	org.tukaani.xz.source [1.8.0.v20180207-1613,1.8.0.v20180207-1613]
 	org.slf4j.api [1.7.2.v20121108-1250,1.7.2.v20121108-1250]
 	org.slf4j.api.source [1.7.2.v20121108-1250,1.7.2.v20121108-1250]
 	org.slf4j.impl.log4j12 [1.7.2.v20131105-2200,1.7.2.v20131105-2200]
diff --git a/pom.xml b/pom.xml
index cf875f146..219c18626 100644
--- a/pom.xml
+++ b/pom.xml
@@ -691,7 +691,7 @@
       <dependency>
         <groupId>org.tukaani</groupId>
         <artifactId>xz</artifactId>
-        <version>1.6</version>
+        <version>1.8</version>
         <optional>true</optional>
       </dependency>