diff --git a/app/build.gradle b/app/build.gradle
index ae3818c..df1d6e7 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -83,7 +83,7 @@ dependencies {
     testImplementation "org.mockito:mockito-core:$mockitoVersion"
 
     // UI
-    def appcompat_version = '1.3.1'
+    def appcompat_version = '1.5.1'
     def constraint_layout_version = '2.1.0'
     def preferenceVersion = '1.1.1'
     def material_version = '1.4.0'