diff --git a/lib/build.gradle b/lib/build.gradle
index 4944ca3..03d93fe 100644
--- a/lib/build.gradle
+++ b/lib/build.gradle
@@ -23,8 +23,8 @@ ext {
 }
 
 // Replace these versions with the latest available versions of libkiwix and libzim
-ext.libkiwix_version = "12.1.0"
-ext.libzim_version = "8.2.1"
+ext.libkiwix_version = "13.0.0"
+ext.libzim_version = "9.0.0"
 
 apply from: 'publish.gradle'
 android {