diff --git a/tesseract/Dockerfile b/tesseract/Dockerfile
index a862440..d2507f1 100644
--- a/tesseract/Dockerfile
+++ b/tesseract/Dockerfile
@@ -5,7 +5,8 @@
 FROM debian:jessie
 MAINTAINER kev <noreply@easypi.info>
 
-RUN apt-get update \
+RUN set -xe \
+    && apt-get update \
     && apt-get install -y autoconf \
                           build-essential \
                           git \