diff --git a/app/build.gradle b/app/build.gradle
index d9e2a5d..98640cd 100755
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -31,7 +31,7 @@ android {
         abortOnError false
     }
 
-    buildToolsVersion "31.0.0"
+    buildToolsVersion "30.0.3"
     compileSdkVersion 31
     defaultConfig {
         applicationId "com.gsnathan.pdfviewer"