diff --git a/gradle/versions.gradle b/gradle/versions.gradle
index 10461f5676..3f173f8000 100644
--- a/gradle/versions.gradle
+++ b/gradle/versions.gradle
@@ -9,7 +9,7 @@ ext.versions = [
 	'xtext_bootstrap': '2.13.0',
 	'gradle_plugins': '0.1.0',
 	'xtext_gradle_plugin': '1.0.20',
-	'lsp4j': '0.4.0-SNAPSHOT',
+	'lsp4j': '0.4.0', // dont forget to adapt IdeProjectDescriptor + Tests
 	'log4j': '1.2.16',
 	'equinoxCommon' : '3.8.0',
 	'equinoxRegistry' : '3.6.100',
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp.ide/pom.xml b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp.ide/pom.xml
index ceb1a301e1..c433f7c7ea 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp.ide/pom.xml
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoApp/org.xtext.example.lsMavenTychoApp.parent/org.xtext.example.lsMavenTychoApp.ide/pom.xml
@@ -18,7 +18,7 @@
 		<dependency>
 			<groupId>org.eclipse.lsp4j</groupId>
 			<artifactId>org.eclipse.lsp4j</artifactId>
-			<version>0.4.0-SNAPSHOT</version>
+			<version>0.4.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.ow2.asm</groupId>
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar.ide/pom.xml b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar.ide/pom.xml
index fa9dc0a523..31cf4ec7d9 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar.ide/pom.xml
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsMavenTychoFatjar/org.xtext.example.lsMavenTychoFatjar.parent/org.xtext.example.lsMavenTychoFatjar.ide/pom.xml
@@ -18,7 +18,7 @@
 		<dependency>
 			<groupId>org.eclipse.lsp4j</groupId>
 			<artifactId>org.eclipse.lsp4j</artifactId>
-			<version>0.4.0-SNAPSHOT</version>
+			<version>0.4.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.ow2.asm</groupId>
diff --git a/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.xtend b/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.xtend
index 8e4ce6f39a..8fc710e7bb 100644
--- a/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.xtend
+++ b/org.eclipse.xtext.xtext.wizard/src/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.xtend
@@ -55,7 +55,7 @@ class IdeProjectDescriptor extends ProjectDescriptor {
 						<dependency>
 							<groupId>org.eclipse.lsp4j</groupId>
 							<artifactId>org.eclipse.lsp4j</artifactId>
-							<version>0.4.0-SNAPSHOT</version>
+							<version>0.4.0</version>
 						</dependency>
 						<dependency>
 							<groupId>org.ow2.asm</groupId>
diff --git a/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.java b/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.java
index a0020fe39e..ddb1979dc2 100644
--- a/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.java
+++ b/org.eclipse.xtext.xtext.wizard/xtend-gen/org/eclipse/xtext/xtext/wizard/IdeProjectDescriptor.java
@@ -107,7 +107,7 @@ public PomFile pom() {
           _builder.append("<artifactId>org.eclipse.lsp4j</artifactId>");
           _builder.newLine();
           _builder.append("\t\t");
-          _builder.append("<version>0.4.0-SNAPSHOT</version>");
+          _builder.append("<version>0.4.0</version>");
           _builder.newLine();
           _builder.append("\t");
           _builder.append("</dependency>");