diff --git a/scripts/Dockerfile b/scripts/Dockerfile
index 2c750466a..102b1edd2 100644
--- a/scripts/Dockerfile
+++ b/scripts/Dockerfile
@@ -10,8 +10,8 @@ FROM ubuntu:16.10
 ENV LANG C.UTF-8
 
 # Needed for setup:
-ADD ./setup-ubuntu.sh /tmp/setup-ubuntu.sh
-ADD ./setup-android-sdk.sh /tmp/setup-android-sdk.sh
+COPY ./setup-ubuntu.sh /tmp/setup-ubuntu.sh
+COPY ./setup-android-sdk.sh /tmp/setup-android-sdk.sh
 
 # Setup needed packages and the Android SDK and NDK:
 RUN apt-get update && \