diff --git a/dependencies/build.gradle b/dependencies/build.gradle
index c53f7ed..662c79c 100644
--- a/dependencies/build.gradle
+++ b/dependencies/build.gradle
@@ -7,7 +7,7 @@ javaPlatform {
 }
 
 dependencies {
-    api platform('org.apache.groovy:groovy-bom:4.0.6')
+    api platform('org.apache.groovy:groovy-bom:4.0.21')
     api platform('org.spockframework:spock-bom:2.3-groovy-4.0')
 
     api 'com.google.auto.service:auto-service-annotations:1.1.1'
diff --git a/examples/build.gradle b/examples/build.gradle
index a67db9d..800341e 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -71,7 +71,7 @@ dependencies {
     spock22groovy30Implementation 'org.spockframework:spock-core'
 
     spock22groovy40Implementation enforcedPlatform(project(':dependencies'))
-    spock22groovy40Implementation enforcedPlatform('org.apache.groovy:groovy-bom:4.0.6')
+    spock22groovy40Implementation enforcedPlatform('org.apache.groovy:groovy-bom:4.0.21')
     spock22groovy40Implementation enforcedPlatform('org.spockframework:spock-bom:2.2-groovy-4.0')
     spock22groovy40Implementation project(':spock-deepmock')
     spock22groovy40Implementation 'net.bytebuddy:byte-buddy'
@@ -95,7 +95,7 @@ dependencies {
     spock23groovy30Implementation 'org.spockframework:spock-core'
 
     spock23groovy40Implementation enforcedPlatform(project(':dependencies'))
-    spock23groovy40Implementation enforcedPlatform('org.apache.groovy:groovy-bom:4.0.6')
+    spock23groovy40Implementation enforcedPlatform('org.apache.groovy:groovy-bom:4.0.21')
     spock23groovy40Implementation enforcedPlatform('org.spockframework:spock-bom:2.3-groovy-4.0')
     spock23groovy40Implementation project(':spock-deepmock')
     spock23groovy40Implementation 'net.bytebuddy:byte-buddy'
diff --git a/spock-deepmock/build.gradle b/spock-deepmock/build.gradle
index a30be93..523807a 100644
--- a/spock-deepmock/build.gradle
+++ b/spock-deepmock/build.gradle
@@ -15,7 +15,7 @@ dependencies {
     annotationProcessor 'com.google.auto.service:auto-service'
 
     compileOnly enforcedPlatform(project(':dependencies'))
-    compileOnly platform('org.apache.groovy:groovy-bom:4.0.6')
+    compileOnly platform('org.apache.groovy:groovy-bom:4.0.21')
     compileOnly platform('org.spockframework:spock-bom:2.3-groovy-4.0')
     compileOnly 'com.google.auto.service:auto-service-annotations'
     compileOnly 'org.spockframework:spock-core'