diff --git a/build.gradle b/build.gradle
index 9c897fce..8696bd47 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,14 +22,20 @@ buildscript {
         targetSdkVersion = 28
         compileSdkVersion = 28
 
-        androidGradlePluginVersion = "3.2.0"
+        androidGradlePluginVersion = "3.2.1"
         androidMavenGradlePluginVersion = "1.5"
-        androidxCoreVersion = "1.0.0"
-        androidxEspressoVersion = "3.1.0-alpha4"
+        androidxAnnotationVersion = "1.0.0"
+        androidxAppCompatVersion = "1.0.2"
+        androidxCoreVersion = "1.0.1"
+        androidxLegacySupportV4Version = "1.0.0"
+        androidxPreferenceVersion = "1.0.0"
+        androidxPreferenceV14Version = "1.0.0"
+        androidxRecyclerViewVersion = "1.0.0"
+        androidxEspressoVersion = "3.1.0"
         androidxTestVersion = "1.1.0-alpha4"
         junitVersion = "4.12"
         gradleBintrayPluginVersion = "1.6"
-        kotlinVersion = "1.2.70"
+        kotlinVersion = "1.3.11"
         materialVersion = "1.0.0"
     }
 
diff --git a/demo-cat-gallery/build.gradle b/demo-cat-gallery/build.gradle
index ac44581e..10cd543f 100644
--- a/demo-cat-gallery/build.gradle
+++ b/demo-cat-gallery/build.gradle
@@ -40,8 +40,8 @@ android {
 
 dependencies {
     implementation project(path: ":flexbox")
-    implementation "androidx.appcompat:appcompat:${rootProject.androidxCoreVersion}"
-    implementation "androidx.recyclerview:recyclerview:${rootProject.androidxCoreVersion}"
+    implementation "androidx.appcompat:appcompat:${rootProject.androidxAppCompatVersion}"
+    implementation "androidx.recyclerview:recyclerview:${rootProject.androidxRecyclerViewVersion}"
     implementation "com.google.android.material:material:${rootProject.materialVersion}"
     implementation "org.jetbrains.kotlin:kotlin-stdlib:${rootProject.kotlinVersion}"
 }
diff --git a/demo-playground/build.gradle b/demo-playground/build.gradle
index 7f49ad64..bd6c1bdd 100644
--- a/demo-playground/build.gradle
+++ b/demo-playground/build.gradle
@@ -40,16 +40,16 @@ android {
 
 dependencies {
     implementation project(":flexbox")
-    implementation "androidx.legacy:legacy-support-v4:${rootProject.androidxCoreVersion}"
-    implementation "androidx.appcompat:appcompat:${rootProject.androidxCoreVersion}"
-    implementation "androidx.preference:preference:${rootProject.androidxCoreVersion}"
-    implementation "androidx.legacy:legacy-preference-v14:${rootProject.androidxCoreVersion}"
+    implementation "androidx.legacy:legacy-support-v4:${rootProject.androidxLegacySupportV4Version}"
+    implementation "androidx.appcompat:appcompat:${rootProject.androidxAppCompatVersion}"
+    implementation "androidx.preference:preference:${rootProject.androidxPreferenceVersion}"
+    implementation "androidx.legacy:legacy-preference-v14:${rootProject.androidxPreferenceV14Version}"
     implementation "com.google.android.material:material:${rootProject.materialVersion}"
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
 
     testImplementation "junit:junit:${rootProject.ext.junitVersion}"
 
-    androidTestImplementation "androidx.annotation:annotation:${rootProject.androidxCoreVersion}"
+    androidTestImplementation "androidx.annotation:annotation:${rootProject.androidxAnnotationVersion}"
     androidTestImplementation "androidx.test:runner:${rootProject.androidxTestVersion}"
     androidTestImplementation "androidx.test:rules:${rootProject.androidxTestVersion}"
     androidTestImplementation "androidx.test.espresso:espresso-core:${rootProject.androidxEspressoVersion}"
diff --git a/flexbox/build.gradle b/flexbox/build.gradle
index 3b62f1a5..f28763f9 100644
--- a/flexbox/build.gradle
+++ b/flexbox/build.gradle
@@ -41,13 +41,13 @@ android {
 
 dependencies {
     compileOnly "androidx.core:core:${rootProject.androidxCoreVersion}"
-    compileOnly "androidx.recyclerview:recyclerview:${rootProject.androidxCoreVersion}"
+    compileOnly "androidx.recyclerview:recyclerview:${rootProject.androidxRecyclerViewVersion}"
 
     testImplementation "junit:junit:${rootProject.junitVersion}"
 
     androidTestImplementation "androidx.core:core:${rootProject.androidxCoreVersion}"
-    androidTestImplementation "androidx.recyclerview:recyclerview:${rootProject.androidxCoreVersion}"
-    androidTestImplementation "androidx.annotation:annotation:${rootProject.androidxCoreVersion}"
+    androidTestImplementation "androidx.recyclerview:recyclerview:${rootProject.androidxRecyclerViewVersion}"
+    androidTestImplementation "androidx.annotation:annotation:${rootProject.androidxAnnotationVersion}"
     androidTestImplementation "androidx.test:runner:${rootProject.androidxTestVersion}"
     androidTestImplementation "androidx.test:rules:${rootProject.androidxTestVersion}"
     androidTestImplementation "androidx.test.espresso:espresso-core:${rootProject.androidxEspressoVersion}"