diff --git a/Dockerfile b/Dockerfile
index dce398c63e..456ae4fb5a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,6 +12,8 @@ RUN cd /tmp && wget "http://pgoapi.com/pgoencrypt.tar.gz" \
     && cd pgoencrypt/src \
     && make \
     && cp libencrypt.so /usr/src/app/encrypt.so
+    && cd /tmp
+    && rm -rf /tmp/pgoencrypt*
 
 VOLUME ["/usr/src/app/web"]