diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 59b5f8928..f04d6a20a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/gradle/wrapper/gradle-wrapper.properties b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/gradle/wrapper/gradle-wrapper.properties
index 59b5f8928..f04d6a20a 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/gradle/wrapper/gradle-wrapper.properties
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.full/org.xtext.example.full.parent/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/gradle/wrapper/gradle-wrapper.properties b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/gradle/wrapper/gradle-wrapper.properties
index 59b5f8928..f04d6a20a 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/gradle/wrapper/gradle-wrapper.properties
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.gradle/org.xtext.example.gradle.parent/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/gradle/wrapper/gradle-wrapper.properties b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/gradle/wrapper/gradle-wrapper.properties
index 59b5f8928..f04d6a20a 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/gradle/wrapper/gradle-wrapper.properties
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleApp/org.xtext.example.lsGradleApp.parent/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/gradle/wrapper/gradle-wrapper.properties b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/gradle/wrapper/gradle-wrapper.properties
index 59b5f8928..f04d6a20a 100644
--- a/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/gradle/wrapper/gradle-wrapper.properties
+++ b/org.eclipse.xtext.tests/testdata/wizard-expectations/org.xtext.example.lsGradleFatjar/org.xtext.example.lsGradleFatjar.parent/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/org.eclipse.xtext.xtext.wizard/resources/gradlew/gradle-wrapper.properties b/org.eclipse.xtext.xtext.wizard/resources/gradlew/gradle-wrapper.properties
index 59b5f8928..f04d6a20a 100644
--- a/org.eclipse.xtext.xtext.wizard/resources/gradlew/gradle-wrapper.properties
+++ b/org.eclipse.xtext.xtext.wizard/resources/gradlew/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.3-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists