diff --git a/BauSystem_15/build.gradle b/BauSystem_15/build.gradle
index 180c7022..d0acd9b2 100644
--- a/BauSystem_15/build.gradle
+++ b/BauSystem_15/build.gradle
@@ -27,8 +27,8 @@ version '1.0'
 
 compileJava.options.encoding = 'UTF-8'
 
-sourceCompatibility = 11
-targetCompatibility = 11
+sourceCompatibility = 17
+targetCompatibility = 17
 
 sourceSets {
     main {
diff --git a/BauSystem_18/build.gradle b/BauSystem_18/build.gradle
index 8fb54099..4ac724e0 100644
--- a/BauSystem_18/build.gradle
+++ b/BauSystem_18/build.gradle
@@ -27,8 +27,8 @@ version '1.0'
 
 compileJava.options.encoding = 'UTF-8'
 
-sourceCompatibility = 11
-targetCompatibility = 11
+sourceCompatibility = 17
+targetCompatibility = 17
 
 sourceSets {
     main {
diff --git a/BauSystem_19/build.gradle b/BauSystem_19/build.gradle
index 900fce9d..7973f1b0 100644
--- a/BauSystem_19/build.gradle
+++ b/BauSystem_19/build.gradle
@@ -28,7 +28,7 @@ version '1.0'
 compileJava.options.encoding = 'UTF-8'
 
 sourceCompatibility = 17
-targetCompatibility = 11
+targetCompatibility = 17
 
 sourceSets {
     main {
diff --git a/BauSystem_20/build.gradle b/BauSystem_20/build.gradle
index b2620127..17121b8d 100644
--- a/BauSystem_20/build.gradle
+++ b/BauSystem_20/build.gradle
@@ -28,7 +28,7 @@ version '1.0'
 compileJava.options.encoding = 'UTF-8'
 
 sourceCompatibility = 17
-targetCompatibility = 11
+targetCompatibility = 17
 
 sourceSets {
     main {
diff --git a/BauSystem_Linkage/build.gradle b/BauSystem_Linkage/build.gradle
index de3818a5..7b54641a 100644
--- a/BauSystem_Linkage/build.gradle
+++ b/BauSystem_Linkage/build.gradle
@@ -27,8 +27,8 @@ version '1.0'
 
 compileJava.options.encoding = 'UTF-8'
 
-sourceCompatibility = 11
-targetCompatibility = 11
+sourceCompatibility = 17
+targetCompatibility = 17
 
 sourceSets {
     main {
diff --git a/BauSystem_Main/build.gradle b/BauSystem_Main/build.gradle
index bf61d861..38432993 100644
--- a/BauSystem_Main/build.gradle
+++ b/BauSystem_Main/build.gradle
@@ -27,8 +27,8 @@ version '1.0'
 
 compileJava.options.encoding = 'UTF-8'
 
-sourceCompatibility = 11
-targetCompatibility = 11
+sourceCompatibility = 17
+targetCompatibility = 17
 
 sourceSets {
     main {
diff --git a/build.gradle b/build.gradle
index 5ce3ebaf..5b8a3f12 100644
--- a/build.gradle
+++ b/build.gradle
@@ -37,8 +37,8 @@ version ''
 compileJava.options.encoding = 'UTF-8'
 compileJava.options.compilerArgs << '-parameter'
 
-sourceCompatibility = 11
-targetCompatibility = 11
+sourceCompatibility = 17
+targetCompatibility = 17
 
 mainClassName = ''