diff --git a/samples/android/build.gradle b/samples/android/build.gradle
index 92cf4b13d..61d8653c1 100644
--- a/samples/android/build.gradle
+++ b/samples/android/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.0'
+    ext.kotlin_version = '1.3.20'
     repositories {
         google()
         jcenter()
@@ -21,6 +21,6 @@ allprojects {
         google()
         jcenter()
         // uncomment to use development build
-        // maven { url "https://dl.bintray.com/spekframework/spek-dev" }
+         maven { url "https://dl.bintray.com/spekframework/spek-dev" }
     }
 }
diff --git a/samples/android/gradle.properties b/samples/android/gradle.properties
index 5208c0607..4c08d8603 100644
--- a/samples/android/gradle.properties
+++ b/samples/android/gradle.properties
@@ -16,7 +16,7 @@ org.gradle.jvmargs=-Xmx1536m
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-spek_version=2.0.0-rc.1
+spek_version=2.0.0-rc.1.192+515f23f
 android_junit5_version=1.2.0.0
 junit5_runner=0.2.2
 jacoco_version=0.8.1
diff --git a/samples/android/gradlew b/samples/android/gradlew
old mode 100644
new mode 100755
diff --git a/samples/android/gradlew.bat b/samples/android/gradlew.bat
old mode 100644
new mode 100755
diff --git a/samples/jvm/build.gradle b/samples/jvm/build.gradle
index 3d4513ec2..0858c1e22 100644
--- a/samples/jvm/build.gradle
+++ b/samples/jvm/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
-    ext.kotlin_version = '1.3.11'
-    ext.spek_version = '2.0.0-rc.1.181+20190113T062549Z'
+    ext.kotlin_version = '1.3.20'
+    ext.spek_version = '2.0.0-rc.1.192+515f23f'
 
     repositories {
         jcenter()
@@ -17,7 +17,7 @@ repositories {
     mavenLocal()
     jcenter()
     // uncomment to use development build
-    // maven { url "https://dl.bintray.com/spekframework/spek-dev" }
+     maven { url "https://dl.bintray.com/spekframework/spek-dev" }
 }
 
 test {
diff --git a/samples/maven/pom.xml b/samples/maven/pom.xml
index 97b27363b..0f78b82e8 100644
--- a/samples/maven/pom.xml
+++ b/samples/maven/pom.xml
@@ -11,8 +11,8 @@
 
     <properties>
         <jdk.version>1.8</jdk.version>
-        <kotlin.version>1.3.0</kotlin.version>
-        <spek.version>2.0.0-rc.1</spek.version>
+        <kotlin.version>1.3.20</kotlin.version>
+        <spek.version>2.0.0-rc.1.192+515f23f</spek.version>
     </properties>
 
     <dependencies>
diff --git a/samples/multiplatform/build.gradle b/samples/multiplatform/build.gradle
index a791299d7..7b428b248 100644
--- a/samples/multiplatform/build.gradle
+++ b/samples/multiplatform/build.gradle
@@ -1,6 +1,6 @@
 buildscript {
-    ext.kotlin_version = '1.3.11'
-    ext.spek_version = '2.0.0-rc.1.181+20190113T062549Z'
+    ext.kotlin_version = '1.3.20'
+    ext.spek_version = '2.0.0-rc.1.192+515f23f'
 
     repositories {
         jcenter()
@@ -17,7 +17,7 @@ repositories {
     mavenLocal()
     jcenter()
     // uncomment to use development build
-    // maven { url "https://dl.bintray.com/spekframework/spek-dev" }
+     maven { url "https://dl.bintray.com/spekframework/spek-dev" }
 }
 
 kotlin {