diff --git a/Triangle.AbstractMachine.Disassembler/build.gradle b/Triangle.AbstractMachine.Disassembler/build.gradle
index 3b3e69d..075e008 100644
--- a/Triangle.AbstractMachine.Disassembler/build.gradle
+++ b/Triangle.AbstractMachine.Disassembler/build.gradle
@@ -1,8 +1,8 @@
-plugins {
-	id 'java'
-	id 'application'
-}
-	
+apply plugin: 'java'
+apply plugin: 'application'
+
+sourceCompatibility = 17
+
 dependencies {
 	implementation project(':Triangle.AbstractMachine')
 }
diff --git a/Triangle.AbstractMachine.Interpreter/build.gradle b/Triangle.AbstractMachine.Interpreter/build.gradle
index 01229b7..cf4fad0 100644
--- a/Triangle.AbstractMachine.Interpreter/build.gradle
+++ b/Triangle.AbstractMachine.Interpreter/build.gradle
@@ -1,8 +1,8 @@
-plugins {
-	id 'java'
-	id 'application'
-}
-	
+apply plugin: 'java'
+apply plugin: 'application'
+
+sourceCompatibility = 17
+
 dependencies {
 	implementation project(':Triangle.AbstractMachine')
 }
diff --git a/Triangle.AbstractMachine/build.gradle b/Triangle.AbstractMachine/build.gradle
index dab3f8e..4324881 100644
--- a/Triangle.AbstractMachine/build.gradle
+++ b/Triangle.AbstractMachine/build.gradle
@@ -1,3 +1,4 @@
-plugins {
-	id 'java-library'
-}
\ No newline at end of file
+apply plugin: 'java-library'
+apply plugin: 'eclipse'
+
+sourceCompatibility = 17
\ No newline at end of file
diff --git a/Triangle.Compiler/build.gradle b/Triangle.Compiler/build.gradle
index b1c62b7..326eb52 100644
--- a/Triangle.Compiler/build.gradle
+++ b/Triangle.Compiler/build.gradle
@@ -1,8 +1,8 @@
-plugins {
-	id 'java'
-	id 'application'
-}
-	
+apply plugin: 'java'
+apply plugin: 'application'
+
+sourceCompatibility = 17
+
 dependencies {
 	implementation project(':Triangle.AbstractMachine')
 }