diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index f32c5f2..3b01a75 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -23,10 +23,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - name: Set up JDK 19
+    - name: Set up JDK 11
       uses: actions/setup-java@v3
       with:
-        java-version: '19'
+        java-version: '11'
         distribution: 'temurin'
     - name: Build with Gradle
       uses: gradle/gradle-build-action@67421db6bd0bf253fb4bd25b31ebb98943c375e1
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 9902dc5..9fe9823 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="openjdk-19" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="openjdk-11" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
-</project>
\ No newline at end of file
+</project>
diff --git a/build.gradle b/build.gradle
index c87c0bd..81c013f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,8 +17,8 @@ ext {
     junitVersion = '5.9.1'
 }
 
-sourceCompatibility = '19'
-targetCompatibility = '19'
+sourceCompatibility = '11'
+targetCompatibility = '11'
 
 tasks.withType(JavaCompile) {
     options.encoding = 'UTF-8'
@@ -30,7 +30,7 @@ application {
 }
 
 javafx {
-    version = '19'
+    version = '11'
     modules = ['javafx.controls', 'javafx.fxml']
 }
 
@@ -55,4 +55,4 @@ jlink {
 
 jlinkZip {
     group = 'distribution'
-}
\ No newline at end of file
+}
diff --git a/src/main/resources/com/simonorow/zoomscheduler/mainUI.fxml b/src/main/resources/com/simonorow/zoomscheduler/mainUI.fxml
index 2bb0279..300fdc1 100644
--- a/src/main/resources/com/simonorow/zoomscheduler/mainUI.fxml
+++ b/src/main/resources/com/simonorow/zoomscheduler/mainUI.fxml
@@ -46,7 +46,7 @@
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.text.Font?>
 
-<VBox prefHeight="590.0" prefWidth="907.0" xmlns="http://javafx.com/javafx/19" xmlns:fx="http://javafx.com/fxml/1">
+<VBox prefHeight="590.0" prefWidth="907.0" xmlns="http://javafx.com/javafx/11" xmlns:fx="http://javafx.com/fxml/1">
   <children>
     <MenuBar prefHeight="20.0" prefWidth="852.0" VBox.vgrow="NEVER">
       <menus>