diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 1be34270..70296970 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -19,4 +19,4 @@ updates:
       # https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#groups
       groovy:
         patterns:
-          - "org.codehaus.groovy:*"
+          - "org.apache.groovy:*"
diff --git a/build.gradle.kts b/build.gradle.kts
index 560a1185..5ee2e621 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -11,7 +11,7 @@ val dependencyVersions = listOf(
   "net.bytebuddy:byte-buddy:1.14.9",
   "net.bytebuddy:byte-buddy-agent:1.14.9",
   "org.apache.commons:commons-compress:1.24.0",
-  "org.codehaus.groovy:groovy:3.0.19",
+  "org.apache.groovy:groovy:4.0.15",
   "org.jetbrains:annotations:24.0.1",
   "org.junit:junit-bom:5.10.0",
 )
diff --git a/client/build.gradle.kts b/client/build.gradle.kts
index 16e1c668..74f874e6 100644
--- a/client/build.gradle.kts
+++ b/client/build.gradle.kts
@@ -73,13 +73,13 @@ dependencies {
       }
     }
     listOf(
-      "org.codehaus.groovy:groovy",
-      "org.codehaus.groovy:groovy-json"
+      "org.apache.groovy:groovy",
+      "org.apache.groovy:groovy-json"
     ).onEach {
       implementation(it) {
         version {
-          strictly("[3,)")
-          prefer("3.0.19")
+          strictly("[4,)")
+          prefer("4.0.15")
         }
       }
     }
@@ -103,8 +103,8 @@ dependencies {
   api("de.gesellix:docker-engine:2023-10-03T21-35-00")
   api("de.gesellix:docker-compose:2023-09-23T20-42-00")
 
-  implementation("org.codehaus.groovy:groovy:3.0.19")
-  implementation("org.codehaus.groovy:groovy-json:3.0.19")
+  implementation("org.apache.groovy:groovy:4.0.15")
+  implementation("org.apache.groovy:groovy-json:4.0.15")
 
   api("com.squareup.moshi:moshi:1.15.0")
   implementation("com.google.re2j:re2j:1.7")
@@ -123,7 +123,7 @@ dependencies {
   testImplementation("de.gesellix:testutil:[2023-09-01T01-01-01,)")
 
   testImplementation("org.junit.platform:junit-platform-launcher:1.10.0")
-  testImplementation("org.spockframework:spock-core:2.3-groovy-3.0")
+  testImplementation("org.spockframework:spock-core:2.3-groovy-4.0")
   testRuntimeOnly("net.bytebuddy:byte-buddy:1.14.9")
   testRuntimeOnly("org.objenesis:objenesis:3.3")
   testImplementation("io.github.joke:spock-mockable:2.3.0")
diff --git a/explore/build.gradle.kts b/explore/build.gradle.kts
index 47a2ea46..8de12862 100644
--- a/explore/build.gradle.kts
+++ b/explore/build.gradle.kts
@@ -38,25 +38,25 @@ dependencies {
       }
     }
     listOf(
-      "org.codehaus.groovy:groovy",
-      "org.codehaus.groovy:groovy-json"
+      "org.apache.groovy:groovy",
+      "org.apache.groovy:groovy-json"
     ).onEach {
       implementation(it) {
         version {
-          strictly("[3,)")
-          prefer("3.0.19")
+          strictly("[4,)")
+          prefer("4.0.15")
         }
       }
     }
   }
   implementation(project(":client"))
-  implementation("org.codehaus.groovy:groovy:3.0.19")
+  implementation("org.apache.groovy:groovy:4.0.15")
   testImplementation("org.apache.commons:commons-compress:1.24.0")
 
   implementation("org.slf4j:slf4j-api:2.0.9")
   runtimeOnly("ch.qos.logback:logback-classic:[1.2,2)!!1.3.11")
 
-  testImplementation("org.spockframework:spock-core:2.3-groovy-3.0")
+  testImplementation("org.spockframework:spock-core:2.3-groovy-4.0")
   testRuntimeOnly("net.bytebuddy:byte-buddy:1.14.9")
   testRuntimeOnly("ch.qos.logback:logback-classic:[1.2,2)!!1.3.11")
 }
diff --git a/integration-test/build.gradle.kts b/integration-test/build.gradle.kts
index 9d77f968..cb1492f8 100644
--- a/integration-test/build.gradle.kts
+++ b/integration-test/build.gradle.kts
@@ -75,7 +75,7 @@ dependencies {
     }
   }
   implementation(project(":client"))
-  testImplementation("org.codehaus.groovy:groovy-json:[3,)")
+  testImplementation("org.apache.groovy:groovy-json:[4,)")
   testImplementation("com.kohlschutter.junixsocket:junixsocket-core:[2.4,)")
   testImplementation("com.kohlschutter.junixsocket:junixsocket-common:[2.4,)")
 
@@ -87,7 +87,7 @@ dependencies {
 
   testImplementation("de.gesellix:docker-registry:2023-10-03T20-58-00")
   testImplementation("de.gesellix:testutil:[2023-09-01T01-01-01,)")
-  testImplementation("org.spockframework:spock-core:2.3-groovy-3.0")
+  testImplementation("org.spockframework:spock-core:2.3-groovy-4.0")
   testRuntimeOnly("net.bytebuddy:byte-buddy:1.14.9")
   testImplementation("org.apache.commons:commons-lang3:3.13.0")
   testRuntimeOnly("ch.qos.logback:logback-classic:[1.2,2)!!1.3.8")