Java versions issue - Open Fire 4.0.3

Ubuntu Linux, fresh installation. Running the latest Oracle Java:

java version "1.8.0_101"

Java(TM) SE Runtime Environment (build 1.8.0_101-b13)

Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

When trying to install via the deb file, the installer requires the installation of "default-jre-headless". When installing this via apt-get, the version which is installed is Java 7. When running the following command:

"update-alternatives --config java"

I get the following:

  Selection    Path                                            Priority   Status

------------------------------------------------------------

  0            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      auto mode

  1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode

* 2            /usr/lib/jvm/java-8-oracle/jre/bin/java          2         manual mode

But when opening the Open Fire web interface, I see the following:

Any ideas how to force OP to use the correct version?

Thanks!