diff --git a/build.gradle.kts b/build.gradle.kts
index 6de859b5..1e47b7f2 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -6,11 +6,11 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import org.jmailen.gradle.kotlinter.KotlinterExtension
 
 plugins {
-  id("nebula.release") version "11.0.0"
-  id("nebula.kotlin") version "1.3.41" apply false
-  id("org.jmailen.kotlinter") version "1.26.0" apply false
+  id("nebula.release") version "12.0.0"
+  id("nebula.kotlin") version "1.3.50" apply false
+  id("org.jmailen.kotlinter") version "2.1.1" apply false
   id("info.solidsoft.pitest") version "1.4.0" apply false
-  id("com.github.ben-manes.versions") version "0.21.0"
+  id("com.github.ben-manes.versions") version "0.25.0"
 }
 
 buildscript {
@@ -47,7 +47,9 @@ subprojects {
 
       // Test with JUnit 5
       dependencies {
-        "testImplementation"(platform("org.junit:junit-bom:5.5.0"))
+        "implementation"(platform("org.jetbrains.kotlin:kotlin-bom:1.3.50"))
+        "implementation"(platform("org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.3.1"))
+        "testImplementation"(platform("org.junit:junit-bom:5.5.2"))
         "testImplementation"("org.junit.jupiter:junit-jupiter-api")
         "testRuntimeOnly"("org.junit.jupiter:junit-jupiter-engine")
       }
@@ -76,7 +78,7 @@ subprojects {
         mutators = setOf("NEW_DEFAULTS")
         targetClasses = setOf("strikt.*")  //by default "${project.group}.*"
         targetTests = setOf("strikt.**.*")
-        pitestVersion = "1.4.9"
+        pitestVersion = "1.4.10"
         threads = System.getenv("PITEST_THREADS")?.toInt()
           ?: Runtime.getRuntime().availableProcessors()
         outputFormats = setOf("XML", "HTML")
diff --git a/strikt-core/strikt-core.gradle.kts b/strikt-core/strikt-core.gradle.kts
index ffc5d1f6..26729abf 100644
--- a/strikt-core/strikt-core.gradle.kts
+++ b/strikt-core/strikt-core.gradle.kts
@@ -7,7 +7,7 @@ plugins {
 
 dependencies {
   implementation("org.jetbrains.kotlin:kotlin-reflect")
-  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.2.2")
+  implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core")
   implementation("org.opentest4j:opentest4j:1.2.0")
   implementation("com.christophsturm:filepeek:0.1.1")
 
diff --git a/strikt-protobuf/strikt-protobuf.gradle.kts b/strikt-protobuf/strikt-protobuf.gradle.kts
index 3d54c3bb..8b1cc340 100644
--- a/strikt-protobuf/strikt-protobuf.gradle.kts
+++ b/strikt-protobuf/strikt-protobuf.gradle.kts
@@ -16,7 +16,7 @@ plugins {
 
 dependencies {
   api(project(":strikt-core"))
-  api("com.google.protobuf:protobuf-java:3.8.0")
+  api("com.google.protobuf:protobuf-java:3.9.1")
 }
 
 tasks.dokka {
@@ -28,7 +28,7 @@ tasks.dokka {
 protobuf {
   protobuf(delegateClosureOf<ProtobufConfigurator> {
     protoc(delegateClosureOf<ExecutableLocator> {
-      artifact = "com.google.protobuf:protoc:3.8.0"
+      artifact = "com.google.protobuf:protoc:3.9.1"
     })
     generateProtoTasks(delegateClosureOf<JavaGenerateProtoTaskCollection> {
       ofSourceSet("test")
diff --git a/strikt-spring/strikt-spring.gradle.kts b/strikt-spring/strikt-spring.gradle.kts
index 98a4c53f..c341342b 100644
--- a/strikt-spring/strikt-spring.gradle.kts
+++ b/strikt-spring/strikt-spring.gradle.kts
@@ -12,7 +12,7 @@ dependencies {
 
   api(project(":strikt-core"))
 
-  implementation(platform("org.springframework.boot:spring-boot-dependencies:2.1.6.RELEASE"))
+  implementation(platform("org.springframework.boot:spring-boot-dependencies:2.1.8.RELEASE"))
   compileOnly("org.springframework:spring-test")
   compileOnly("org.springframework:spring-web")
   compileOnly("javax.servlet:javax.servlet-api")