diff --git a/app/build.gradle b/app/build.gradle
index 7675b8f1..2ff97221 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -14,8 +14,8 @@ android {
         applicationId "com.termux"
         minSdkVersion 21
         targetSdkVersion 28
-        versionCode 66025
-        versionName "0.66_v0.2.5_nix"
+        versionCode 66026
+        versionName "0.66_v0.2.6_nix"
         applicationIdSuffix ".nix"
     }
 
diff --git a/app/src/main/java/com/termux/app/TermuxInstaller.java b/app/src/main/java/com/termux/app/TermuxInstaller.java
index 027ebeac..5a15df62 100644
--- a/app/src/main/java/com/termux/app/TermuxInstaller.java
+++ b/app/src/main/java/com/termux/app/TermuxInstaller.java
@@ -52,7 +52,7 @@ import java.util.zip.ZipInputStream;
  */
 final class TermuxInstaller {
 
-    static String defaultBootstrapURL = "https://nix-on-droid.unboiled.info/bootstrap-release-20.09";
+    static String defaultBootstrapURL = "https://nix-on-droid.unboiled.info/bootstrap-release-21.05";
 
     /** Performs setup if necessary. */
     static void setupIfNeeded(final Activity activity, final Runnable whenDone) {