diff --git a/build/javaproject.gradle b/build/javaproject.gradle
index 4ef001c0855cb3a18c7c90ae02e288f961625088..964a9ae5f00a9b708b68f315155d0612b2b3f14a 100644
--- a/build/javaproject.gradle
+++ b/build/javaproject.gradle
@@ -29,8 +29,8 @@ configurations.all {
 //    gradleVersion = '4.10.3'
 //    distributionUrl = "https://services.gradle.org/distributions/gradle-4.10.3-bin.zip"
 //}
-sourceCompatibility='1.8'
-targetCompatibility='1.8'
+sourceCompatibility='11'
+targetCompatibility='11'
 
 sourceSets { 
     main {
diff --git a/lib-file-download/javaproject.gradle b/lib-file-download/javaproject.gradle
index b56780d6291ded6391af3e131ba9599ef7ece91d..388b924f3d502dceffeadf5d3636b74c0a048747 100644
--- a/lib-file-download/javaproject.gradle
+++ b/lib-file-download/javaproject.gradle
@@ -23,8 +23,8 @@ task wrapper(type: Wrapper) {
     distributionUrl = "http://svnsis.ethz.ch/repos/cisd/ivy-repository/trunk/gradle/distribution/3.5/gradle-3.5-all.zip"
 }
 
-sourceCompatibility='1.8'
-targetCompatibility='1.8'
+sourceCompatibility='11'
+targetCompatibility='11'
 
 sourceSets { 
     main {