diff --git a/app/build.gradle b/app/build.gradle
index 0fee4cb9bb..6ba293461b 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -57,8 +57,12 @@ repositories {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
-    def androidx_version = "1.0.0"
+    def appcompat_version = "1.0.2"
+    def recyclerview_version = "1.0.0"
+    def coordinatorlayout_version = "1.0.0"
     def constraintlayout_version = "1.1.3"
+    def material_version = "1.0.0"
+    def browser_version = "1.0.0"
     def lifecycle_version = "2.0.0"
     def room_version = "2.0.0"
     def paging_version = "2.0.0"
@@ -74,23 +78,23 @@ dependencies {
     // https://developer.android.com/jetpack/docs/release-notes
 
     // https://mvnrepository.com/artifact/androidx.appcompat/appcompat
-    implementation "androidx.appcompat:appcompat:$androidx_version"
+    implementation "androidx.appcompat:appcompat:appcompat_version"
 
     // https://mvnrepository.com/artifact/androidx.recyclerview/recyclerview
-    implementation "androidx.recyclerview:recyclerview:$androidx_version"
-    implementation "androidx.recyclerview:recyclerview-selection:$androidx_version"
+    implementation "androidx.recyclerview:recyclerview:$recyclerview_version"
+    implementation "androidx.recyclerview:recyclerview-selection:$recyclerview_version"
 
     // https://mvnrepository.com/artifact/androidx.coordinatorlayout/coordinatorlayout
-    implementation "androidx.coordinatorlayout:coordinatorlayout:$androidx_version"
+    implementation "androidx.coordinatorlayout:coordinatorlayout:$coordinatorlayout_version"
 
     // https://mvnrepository.com/artifact/androidx.constraintlayout/constraintlayout
     implementation "androidx.constraintlayout:constraintlayout:$constraintlayout_version"
 
     // https://mvnrepository.com/artifact/com.google.android.material/material
-    implementation "com.google.android.material:material:$androidx_version"
+    implementation "com.google.android.material:material:$material_version"
 
     // https://mvnrepository.com/artifact/androidx.browser/browser
-    implementation "androidx.browser:browser:$androidx_version"
+    implementation "androidx.browser:browser:$browser_version"
 
     // https://mvnrepository.com/artifact/androidx.lifecycle/lifecycle-runtime
     implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version"