diff --git a/app/build.gradle b/app/build.gradle
index aa24aec..02fbebf 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -14,10 +14,10 @@ android {
         applicationId "org.purplei2p.i2pd"
         targetSdkVersion 29
         minSdkVersion 16
-        versionCode 24100
-        versionName "2.41.0"
+        versionCode 24101
+        versionName "2.41.0.1"
         setProperty("archivesBaseName", archivesBaseName + "-" + versionName)
-        ndkVersion "23.1.7779620"
+        ndkVersion "21.4.7075529"
 
         ndk {
             abiFilters "armeabi-v7a"
diff --git a/app/jni/build_boost.sh b/app/jni/build_boost.sh
index 9552b74..bdd43af 100755
--- a/app/jni/build_boost.sh
+++ b/app/jni/build_boost.sh
@@ -2,8 +2,8 @@
 
 set -e
 
-BOOST_VERSION=1.78.0
-BOOST_VERSION_SUFFIX=1_78
+BOOST_VERSION=1.74.0
+BOOST_VERSION_SUFFIX=1_74
 BOOST_LIBS=date_time,filesystem,program_options,system
 
 REMOVE_BOOST_LIBS_SUFFIX_x86_64=-clang-mt-x64-${BOOST_VERSION_SUFFIX}