diff --git a/.travis.yml b/.travis.yml
index 4aa31b90..6b37a28c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,8 @@ language: java
 matrix:
   fast_finish: true
   include:
+  - env: IMAGE=maven:3-jdk-13
+  - env: IMAGE=maven:3-jdk-12
   - env: IMAGE=maven:3-jdk-11 JDOC=Y
   - env: IMAGE=maven:3-jdk-10
   - env: IMAGE=maven:3-jdk-9
diff --git a/HOWTO.md b/HOWTO.md
index 230e4a84..182fa099 100644
--- a/HOWTO.md
+++ b/HOWTO.md
@@ -11,8 +11,8 @@ Capitalization is tricky:
 ## How to make a release (for committers)
 
 Make sure `mvn clean install`, `mvn site`, and
-`mvn javadoc:javadoc javadoc:test-javadoc` pass under JDK 8, 9, 10 and
-11.
+`mvn javadoc:javadoc javadoc:test-javadoc` pass under JDK 8, 9, 10,
+11 and 12.
 
 Write release notes. Run the
 [relNotes](https://github.com/julianhyde/share/blob/master/tools/relNotes)
@@ -21,7 +21,7 @@ script and append the output to [HISTORY.md](HISTORY.md).
 Update version numbers in README, README.md, src/docbkx/manual.xml,
 and the copyright date in NOTICE.
 
-Switch to JDK 11.
+Switch to JDK 12.
 
 Check that the sandbox is clean:
 
diff --git a/README.md b/README.md
index fc7b9308..9ec45473 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ Use the following definition to use `sqlline` in your maven project:
 Prerequisites:
 
 * Maven 3.2.5 or higher
-* Java 8 or higher (10 preferred)
+* Java 8 or higher (12 preferred)
 
 Check out and build:
 
diff --git a/appveyor.yml b/appveyor.yml
index 8a806abb..d9b64221 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,6 +19,7 @@ environment:
   - JAVA_HOME: C:\Program Files\Java\jdk9
   - JAVA_HOME: C:\Program Files\Java\jdk10
   - JAVA_HOME: C:\Program Files\Java\jdk11
+  - JAVA_HOME: C:\Program Files\Java\jdk12
 build_script:
 - mvn clean -V install -DskipTests -Dmaven.javadoc.skip=true -Djavax.net.ssl.trustStorePassword=changeit
 test_script: