diff --git a/build.gradle b/build.gradle
index 63b48860..230da735 100644
--- a/build.gradle
+++ b/build.gradle
@@ -71,7 +71,7 @@ configure(subprojects) {
                 name = 'myLocalRepositoryForFullIntegrationTests'
                 //noinspection GrDeprecatedAPIUsage
                 File baseDir = file(project.parent.buildDir)
-                url = new File (baseDir, "maven-repo")
+                url = new File(baseDir, "maven-repo")
             }
             mavenLocal()
         }
@@ -92,8 +92,30 @@ configure(subprojects) {
     }
 }
 
+def groovyVersion = libs.groovy.bom.get().version
+def groovyVersionMajorMinor = groovyVersion.split('\\.')[0..1] .join('.')
+
 tasks.named("dependencyUpdates").configure {
     gradleReleaseChannel = true
+
+    resolutionStrategy {
+        componentSelection { rules ->
+            rules.all { ComponentSelection selection ->
+                if (selection.candidate.version =~ /(alpha|M)/) {
+                    selection.reject('Rejected alpha or milestone version')
+                } else if (selection.candidate.group == 'org.spockframework') {
+                    def spockGroovyVersion = selection.candidate.version.split('-')[2]
+                    if (spockGroovyVersion != groovyVersionMajorMinor) {
+                        selection.reject("Spock's Groovy version ($spockGroovyVersion) does not match project's Groovy major/minor version ($groovyVersionMajorMinor)")
+                    }
+                } else if (selection.candidate.group == 'org.codehaus.groovy') {
+                    if (selection.candidate.version != groovyVersion) {
+                        selection.reject("Groovy version is determined by Gradle API (${groovyVersion})")
+                    }
+                }
+            }
+        }
+    }
 }
 
 sonar {
@@ -121,7 +143,7 @@ tasks.register("integrationTestOnly") {
         }
         logger.debug "Script output: $result"
         File integrationTestDirectory = file(INTEGRATION_TEST_DIRECTORY)
-        final File testIndex = new File (integrationTestDirectory, "build/reports/index.html")
+        final File testIndex = new File(integrationTestDirectory, "build/reports/index.html")
         assert testIndex.exists()
     }
 }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index dd6cba40..0e837d77 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,22 +1,23 @@
 [versions]
-groovy-version = "3.0.17"
-junit5-version = "5.10.1"
+groovy-version = '3.0.17'
+junit5-version = '5.10.2'
+slf4j-version = '2.0.13'
 
 [libraries]
-commons-validator = "commons-validator:commons-validator:1.8.0"
-# Use Groovy which corresponds to Gradle version (of hsc build)
-groovy-bom = { module = "org.codehaus.groovy:groovy-bom", version.ref = "groovy-version" }
-jsoup = "org.jsoup:jsoup:1.17.2"
-junit-vintage = { module = "org.junit.vintage:junit-vintage-engine", version.ref = "junit5-version" }
-lombok = "org.projectlombok:lombok:1.18.30"
-slf4j-api = "org.slf4j:slf4j-api:2.0.11"
-slf4j-nop = "org.slf4j:slf4j-nop:2.0.11"
-spock = "org.spockframework:spock-bom:2.3-groovy-3.0"
+commons-validator = 'commons-validator:commons-validator:1.8.0'
+# Use Groovy which corresponds to a Gradle version (of hsc build)
+groovy-bom = { module = 'org.codehaus.groovy:groovy-bom', version.ref = 'groovy-version' }
+jsoup = 'org.jsoup:jsoup:1.17.2'
+junit-vintage = { module = 'org.junit.vintage:junit-vintage-engine', version.ref = 'junit5-version' }
+lombok = 'org.projectlombok:lombok:1.18.32'
+slf4j-api = { module = 'org.slf4j:slf4j-api', version.ref = 'slf4j-version' }
+slf4j-nop = { module = 'org.slf4j:slf4j-nop', version.ref = 'slf4j-version' }
+spock = 'org.spockframework:spock-bom:2.3-groovy-3.0'
 
 [plugins]
-gradle-versions = { id= "com.github.ben-manes.versions", version = "0.51.0" }
-sonar = { id = "org.sonarqube", version = "5.0.0.4638" }
-gitProperties = { id = "com.gorylenko.gradle-git-properties", version = "2.4.1" }
+gradle-versions = { id= 'com.github.ben-manes.versions', version = '0.51.0' }
+sonar = { id = 'org.sonarqube', version = '5.0.0.4638' }
+gitProperties = { id = 'com.gorylenko.gradle-git-properties', version = '2.4.1' }
 
 # Copyright Gerd Aschemann and aim42 contributors.
 #
diff --git a/htmlSanityCheck-core/build.gradle b/htmlSanityCheck-core/build.gradle
index 7ec9d847..b4916369 100644
--- a/htmlSanityCheck-core/build.gradle
+++ b/htmlSanityCheck-core/build.gradle
@@ -68,12 +68,9 @@ tasks.register('copyResourceImages', Copy) {
 processResources {
     dependsOn copyResourceImages, generateGitProperties
 
-//    duplicatesStrategy = DuplicatesStrategy.INHERIT
-
     exclude '**/*.png'
     inputs.property "version", project.version
     filter ReplaceTokens, tokens: [version: project.version]
-    println "after processResources config, version= ${project.version}"
 }
 
 /*