diff --git a/app/build.gradle b/app/build.gradle
index 92071cdec5..959dd342da 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,7 +2,6 @@ apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-kapt'
 apply plugin: 'com.google.gms.google-services'
-//apply plugin: 'jacoco-android'
 apply plugin: 'com.hiya.jacoco-android'
 apply plugin: 'com.google.firebase.crashlytics'
 
@@ -117,9 +116,6 @@ android {
         buildConfigField "String", "HEAD", '"' + generateGitBuild() + '"'
         buildConfigField "String", "COMMITTED", '"' + allCommitted() + '"'
 
-        ndk {
-            moduleName "BleCommandUtil"
-        }
     }
 
     flavorDimensions "standard"
diff --git a/app/src/main/jniLibs/README.md b/app/src/main/jniLibs/README.md
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/app/src/main/jniLibs/arm64-v8a/libBleCommandUtil.so b/app/src/main/jniLibs/arm64-v8a/libBleCommandUtil.so
deleted file mode 100644
index 69e283b5fe..0000000000
Binary files a/app/src/main/jniLibs/arm64-v8a/libBleCommandUtil.so and /dev/null differ
diff --git a/app/src/main/jniLibs/armeabi-v7a/libBleCommandUtil.so b/app/src/main/jniLibs/armeabi-v7a/libBleCommandUtil.so
deleted file mode 100644
index 0c717bc3e8..0000000000
Binary files a/app/src/main/jniLibs/armeabi-v7a/libBleCommandUtil.so and /dev/null differ
diff --git a/app/src/main/jniLibs/armeabi/libBleCommandUtil.so b/app/src/main/jniLibs/armeabi/libBleCommandUtil.so
deleted file mode 100644
index a51a8c7d9a..0000000000
Binary files a/app/src/main/jniLibs/armeabi/libBleCommandUtil.so and /dev/null differ
diff --git a/app/src/main/jniLibs/mips/libBleCommandUtil.so b/app/src/main/jniLibs/mips/libBleCommandUtil.so
deleted file mode 100644
index fcff5eb6b2..0000000000
Binary files a/app/src/main/jniLibs/mips/libBleCommandUtil.so and /dev/null differ
diff --git a/app/src/main/jniLibs/mips64/libBleCommandUtil.so b/app/src/main/jniLibs/mips64/libBleCommandUtil.so
deleted file mode 100644
index a8a292ea13..0000000000
Binary files a/app/src/main/jniLibs/mips64/libBleCommandUtil.so and /dev/null differ
diff --git a/app/src/main/jniLibs/x86/libBleCommandUtil.so b/app/src/main/jniLibs/x86/libBleCommandUtil.so
deleted file mode 100644
index 638a9def95..0000000000
Binary files a/app/src/main/jniLibs/x86/libBleCommandUtil.so and /dev/null differ
diff --git a/app/src/main/jniLibs/x86_64/libBleCommandUtil.so b/app/src/main/jniLibs/x86_64/libBleCommandUtil.so
deleted file mode 100644
index 94873d3732..0000000000
Binary files a/app/src/main/jniLibs/x86_64/libBleCommandUtil.so and /dev/null differ
diff --git a/danars/build.gradle b/danars/build.gradle
index 09899f5540..9ac3aa3f9a 100644
--- a/danars/build.gradle
+++ b/danars/build.gradle
@@ -8,9 +8,15 @@ apply from: "${project.rootDir}/gradle/android_module_dependencies.gradle"
 apply from: "${project.rootDir}/gradle/test_dependencies.gradle"
 
 android {
+    ndkVersion "21.1.6352462"
+
     defaultConfig {
         versionCode 1
         versionName "1.0"
+
+        ndk {
+            moduleName "BleCommandUtil"
+        }
     }
 }