diff --git a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/extension/QuarkusPluginExtension.java b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/extension/QuarkusPluginExtension.java
index ee4fd9f4100fc..b947848ca194d 100644
--- a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/extension/QuarkusPluginExtension.java
+++ b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/extension/QuarkusPluginExtension.java
@@ -21,6 +21,7 @@
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.provider.Property;
 import org.gradle.api.provider.Provider;
+import org.gradle.api.provider.MapProperty;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.SourceSetContainer;
 import org.gradle.api.tasks.testing.Test;
@@ -39,7 +40,7 @@ public class QuarkusPluginExtension {
 
     private final Property<String> finalName;
 
-    private Map<String, String> quarkusBuildProperties;
+    private final MapProperty<String, String> quarkusBuildProperties;
     private final SourceSetExtension sourceSetExtension;
 
     public QuarkusPluginExtension(Project project) {
@@ -49,7 +50,7 @@ public QuarkusPluginExtension(Project project) {
         finalName.convention(project.provider(() -> String.format("%s-%s", project.getName(), project.getVersion())));
 
         this.sourceSetExtension = new SourceSetExtension();
-        quarkusBuildProperties = new HashMap<>();
+        this.quarkusBuildProperties = project.getObjects().mapProperty(String.class, String.class);
     }
 
     public void beforeTest(Test task) {
@@ -99,7 +100,7 @@ public void beforeTest(Test task) {
     public String buildNativeRunnerName(final Map<String, Object> taskSystemProps) {
         Properties properties = new Properties(taskSystemProps.size());
         properties.putAll(taskSystemProps);
-        quarkusBuildProperties.entrySet()
+        quarkusBuildProperties.get().entrySet()
                 .forEach(buildEntry -> properties.putIfAbsent(buildEntry.getKey(), buildEntry.getValue()));
         System.getProperties().entrySet()
                 .forEach(propEntry -> properties.putIfAbsent(propEntry.getKey(), propEntry.getValue()));
@@ -215,7 +216,7 @@ public Path appJarOrClasses() {
         return classesDir;
     }
 
-    public Map<String, String> getQuarkusBuildProperties() {
+    public MapProperty<String, String> getQuarkusBuildProperties() {
         return quarkusBuildProperties;
     }
 
@@ -223,4 +224,8 @@ public void set(String name, @Nullable String value) {
         quarkusBuildProperties.put(String.format("quarkus.%s", name), value);
     }
 
+    public void set(String name, Property<String> value) {
+        quarkusBuildProperties.put(String.format("quarkus.%s", name), value);
+    }
+
 }
diff --git a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusBuild.java b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusBuild.java
index 4d98e2e99a3d8..1b3698e4f668a 100644
--- a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusBuild.java
+++ b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusBuild.java
@@ -256,8 +256,9 @@ private String getPropValueWithPrecedence(final String propName, final java.util
                 }
             });
         }
-        if (extension().getQuarkusBuildProperties().containsKey(propName)) {
-            return extension().getQuarkusBuildProperties().get(propName);
+        Map<String, String> quarkusBuildProperties = extension().getQuarkusBuildProperties().get();
+        if (quarkusBuildProperties.containsKey(propName)) {
+            return quarkusBuildProperties.get(propName);
         } else if (applicationProperties.contains(propName)) {
             return applicationProperties.getProperty(propName);
         } else if (getQuarkusBuildEnvProperties().containsKey(propName)) {
diff --git a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusTask.java b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusTask.java
index 62a24bbdc5abc..e16c737d6009f 100644
--- a/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusTask.java
+++ b/devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusTask.java
@@ -34,8 +34,9 @@ protected Properties getBuildSystemProperties(ResolvedDependency appArtifact) {
                 realProperties.setProperty(key, (String) value);
             }
         }
-        if (!extension().getQuarkusBuildProperties().isEmpty()) {
-            extension().getQuarkusBuildProperties().entrySet().stream().filter(entry -> entry.getKey().startsWith("quarkus."))
+        Map<String, String> quarkusBuildProperties = extension().getQuarkusBuildProperties().get();
+        if (!quarkusBuildProperties.isEmpty()) {
+            quarkusBuildProperties.entrySet().stream().filter(entry -> entry.getKey().startsWith("quarkus."))
                     .forEach(entry -> {
                         realProperties.put(entry.getKey(), entry.getValue());
                     });