diff --git a/packaging/assembly.xml b/packaging/assembly.xml
index 70dfc7673..57f1d4724 100644
--- a/packaging/assembly.xml
+++ b/packaging/assembly.xml
@@ -20,18 +20,14 @@
 			<fileMode>0777</fileMode>
 		</file>
 		<file>
-			<source>src/main/scripts/vscode.sh</source>
-			<destName>vscode.sh</destName>
+			<source>src/main/scripts/vsix.sh</source>
+			<destName>vsix.sh</destName>
 			<fileMode>0777</fileMode>
 		</file>
 		<file>
 			<source>src/main/scripts/README_VDMJ</source>
 			<destName>README_VDMJ</destName>
 		</file>
-		<file>
-			<source>src/main/scripts/README_VSCODE</source>
-			<destName>README_VSCODE</destName>
-		</file>
 	</files>
 	
 	<fileSets>
diff --git a/packaging/src/main/scripts/vsix.sh b/packaging/src/main/scripts/vsix.sh
new file mode 100755
index 000000000..3365f252c
--- /dev/null
+++ b/packaging/src/main/scripts/vsix.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+#
+# Update a VDM VSCode VSIX, using the jars in this distribution.
+# Download VSIX from https://marketplace.visualstudio.com/items?itemName=overturetool.vdm-vscode
+#
+
+function usage()
+{
+    echo "Usage: $(basename $0) <VDM VSCode VSIX>"
+    echo "e.g. $(basename $0) overturetool.vdm-vscode-1.3.7.vsix"
+    exit 1
+}
+
+if [ $# -ne 1 -o "$1" = "-help" ]
+then
+    usage
+fi
+
+VERSION="4.5.0-P-SNAPSHOT"
+VDMJ="vdmj_hp"
+
+SELF=$(which "$0")
+DISTRIBUTION=$(dirname "$SELF")
+VSIX=$(realpath ${1})
+
+if [ ! -e "$VSIX" ]
+then
+    echo "Cannot find VDM VSCode VSIX at $VSIX"
+    usage
+fi
+
+if [[ "$VSIX" != *.vsix ]]
+then
+    echo "File passed is not a VSIX?"
+    usage
+fi
+
+echo "**************************** Updating VSIX! ****************************"
+(
+    cd "$DISTRIBUTION"
+    rm -rf extension
+    EXTRACT="extension/resources/jars"
+    unzip -q "$VSIX" "$EXTRACT/$VDMJ/*" "$EXTRACT/plugins/*"
+
+    cp -vf vdmj-$VERSION.jar $EXTRACT/$VDMJ
+    cp -vf lsp-$VERSION.jar $EXTRACT/$VDMJ
+    cp -vf annotations-$VERSION.jar $EXTRACT/$VDMJ
+    cp -vf stdlib-$VERSION.jar $EXTRACT/$VDMJ/libs
+    cp -vf quickcheck-$VERSION.jar $EXTRACT/plugins
+
+    zip -q "$VSIX" $(find $EXTRACT -type f)
+    rm -rf extension
+)
+echo "**************************** FINISHED **********************************"
+
+exit 0