diff --git a/app/build.gradle b/app/build.gradle
index d358fff7..4638ed7a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -4,6 +4,7 @@ plugins {
 
 android {
     compileSdkVersion 28
+    ndkVersion '21.0.6113669'
 
     dependencies {
         implementation "androidx.annotation:annotation:1.1.0"
diff --git a/terminal-emulator/build.gradle b/terminal-emulator/build.gradle
index dd6da0a3..19128a21 100644
--- a/terminal-emulator/build.gradle
+++ b/terminal-emulator/build.gradle
@@ -18,6 +18,7 @@ ext {
 
 android {
     compileSdkVersion 28
+    ndkVersion '21.0.6113669'
 
     defaultConfig {
         minSdkVersion 21