diff --git a/.codenvy.dockerfile b/.codenvy.dockerfile
index 8160853..2f1eeb3 100644
--- a/.codenvy.dockerfile
+++ b/.codenvy.dockerfile
@@ -3,5 +3,5 @@ FROM codenvy/ubuntu_jdk8
 # Install Ngrok
 ADD https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip /ngrok.zip
 RUN set -x \
- && sudo unzip -o ngrok.zip -d /bin \
+ && sudo unzip -o /ngrok.zip -d /bin \
  && sudo rm -f /ngrok.zip
diff --git a/Dockerfile b/Dockerfile
index 6652662..703fecc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ MAINTAINER Werner Beroux <werner@beroux.com>
 # Install ngrok (latest official stable from https://ngrok.com/download).
 ADD https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip /ngrok.zip
 RUN set -x \
- && unzip -o ngrok.zip -d /bin \
+ && unzip -o /ngrok.zip -d /bin \
  && rm -f /ngrok.zip
 
 # Add config script.