diff --git a/01_creating_new_gradle_builds/gradle/wrapper/gradle-wrapper.properties b/01_creating_new_gradle_builds/gradle/wrapper/gradle-wrapper.properties
index ac33e99..7738f62 100644
--- a/01_creating_new_gradle_builds/gradle/wrapper/gradle-wrapper.properties
+++ b/01_creating_new_gradle_builds/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
+zipStorePath=wrapper/dists
\ No newline at end of file
diff --git a/02_gradle_build_for_java_library/build.gradle.kts b/02_gradle_build_for_java_library/build.gradle.kts
index 98c4651..3c5a881 100644
--- a/02_gradle_build_for_java_library/build.gradle.kts
+++ b/02_gradle_build_for_java_library/build.gradle.kts
@@ -22,5 +22,5 @@ repositories {
 dependencies {
     api("org.apache.commons:commons-math3:3.6.1")
     implementation("com.google.guava:guava:28.1-jre")
-    testImplementation("junit:junit:4.12")
+    testImplementation("junit:junit:4.13.2")
 }
diff --git a/02_gradle_build_for_java_library/gradle/wrapper/gradle-wrapper.properties b/02_gradle_build_for_java_library/gradle/wrapper/gradle-wrapper.properties
index ac33e99..7738f62 100644
--- a/02_gradle_build_for_java_library/gradle/wrapper/gradle-wrapper.properties
+++ b/02_gradle_build_for_java_library/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
+zipStorePath=wrapper/dists
\ No newline at end of file
diff --git a/03_gradle_build_for_java_application/build.gradle.kts b/03_gradle_build_for_java_application/build.gradle.kts
index 8957b4c..075447b 100644
--- a/03_gradle_build_for_java_application/build.gradle.kts
+++ b/03_gradle_build_for_java_application/build.gradle.kts
@@ -9,7 +9,7 @@ repositories {
 
 dependencies {
     implementation("com.google.guava:guava:28.1-jre")
-    testImplementation("junit:junit:4.12")
+    testImplementation("junit:junit:4.13.2")
 }
 
 application {
diff --git a/03_gradle_build_for_java_application/gradle/wrapper/gradle-wrapper.properties b/03_gradle_build_for_java_application/gradle/wrapper/gradle-wrapper.properties
index ac33e99..7738f62 100644
--- a/03_gradle_build_for_java_application/gradle/wrapper/gradle-wrapper.properties
+++ b/03_gradle_build_for_java_application/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
+zipStorePath=wrapper/dists
\ No newline at end of file
diff --git a/04_gradle_build_for_java_webapp/build.gradle.kts b/04_gradle_build_for_java_webapp/build.gradle.kts
index 17b8161..86b6d97 100644
--- a/04_gradle_build_for_java_webapp/build.gradle.kts
+++ b/04_gradle_build_for_java_webapp/build.gradle.kts
@@ -9,6 +9,6 @@ repositories {
 
 dependencies {
     providedCompile("javax.servlet:javax.servlet-api:3.1.0") 
-    testCompile("junit:junit:4.12")
+    testCompile("junit:junit:4.13.2")
 }
 
diff --git a/04_gradle_build_for_java_webapp/gradle/wrapper/gradle-wrapper.properties b/04_gradle_build_for_java_webapp/gradle/wrapper/gradle-wrapper.properties
index ac33e99..7738f62 100644
--- a/04_gradle_build_for_java_webapp/gradle/wrapper/gradle-wrapper.properties
+++ b/04_gradle_build_for_java_webapp/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
-zipStorePath=wrapper/dists
+zipStorePath=wrapper/dists
\ No newline at end of file