diff --git a/README.md b/README.md
index 157e82e..96a1f82 100644
--- a/README.md
+++ b/README.md
@@ -83,5 +83,4 @@ the following file formats are supported:
 * toml/tml -- ie. TOML 0.4 -- https://github.com/toml-lang/toml/blob/master/versions/en/toml-v0.4.0.md
 * json -- ie. JSON -- https://www.json.org/json-en.html
 * hson/hjson -- ie. human JSON -- https://hjson.github.io/
-* plist -- ie. ASCII plist files, NeXT / OpenStep style configuration
 
diff --git a/pom.xml b/pom.xml
index 6a1bc64..682b4d6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.github.terefang</groupId>
     <artifactId>template-maven-plugin</artifactId>
-    <version>2020.5.12</version>
+    <version>2020.5.14</version>
 
     <packaging>maven-plugin</packaging>
 
diff --git a/src/main/java/com/github/terefang/template_maven_plugin/AbstractTmpMojo.java b/src/main/java/com/github/terefang/template_maven_plugin/AbstractTmpMojo.java
index f2e45fd..521c872 100644
--- a/src/main/java/com/github/terefang/template_maven_plugin/AbstractTmpMojo.java
+++ b/src/main/java/com/github/terefang/template_maven_plugin/AbstractTmpMojo.java
@@ -8,6 +8,7 @@
 import org.apache.maven.plugin.AbstractMojo;
 import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.project.MavenProject;
+import org.codehaus.plexus.util.StringUtils;
 
 import java.io.File;
 import java.io.FileReader;
@@ -34,6 +35,12 @@ public abstract class AbstractTmpMojo extends AbstractMojo
     @Parameter(defaultValue = "context")
     protected String additionalContextRoot;
 
+    /**
+     * additional global variable
+     */
+    @Parameter(defaultValue = "")
+    protected String additionalVariables;
+
     @SneakyThrows
     public void prepareAdditionalContext(Map<String, Object> context) {
         if(additionalContext.exists())
@@ -41,6 +48,15 @@ public void prepareAdditionalContext(Map<String, Object> context) {
             getLog().info(MessageFormat.format("loading context {0} from {1}", additionalContextRoot, additionalContext.getName()));
             context.put(additionalContextRoot, ContextUtil.loadContextFrom(additionalContext));
         }
+        if(StringUtils.isNotEmpty(additionalVariables))
+        {
+            String[] entries = StringUtils.split(additionalVariables);
+            for(String entry : entries)
+            {
+                String[] keyValue = StringUtils.split(entry, "=");
+                context.put(keyValue[0], keyValue[1]);
+            }
+        }
     }
 
     public void prepareStandardContext(Map<String, Object> context)