diff --git a/ckan/Dockerfile b/ckan/Dockerfile
index eb25e1e..6592438 100644
--- a/ckan/Dockerfile
+++ b/ckan/Dockerfile
@@ -27,7 +27,7 @@ RUN if ! [ /usr/share/zoneinfo/${TZ} -ef /etc/localtime ]; then \
 # runtime mounted ones)
 # See https://github.com/okfn/docker-ckan#applying-patches
 
-ADD patches ${APP_DIR}/
+COPY patches ${APP_DIR}/
 
 RUN for d in ${APP_DIR}/patches/*; do \
         if [ -d $d ]; then \
diff --git a/ckan/Dockerfile.dev b/ckan/Dockerfile.dev
index c4c5758..f3ab3f1 100644
--- a/ckan/Dockerfile.dev
+++ b/ckan/Dockerfile.dev
@@ -25,7 +25,7 @@ RUN if ! [ /usr/share/zoneinfo/${TZ} -ef /etc/localtime ]; then \
 # Apply any patches needed to CKAN core or any of the built extensions (not the
 # runtime mounted ones)
 # See https://github.com/okfn/docker-ckan#applying-patches
-ADD patches ${APP_DIR}/
+COPY patches ${APP_DIR}/
 
 RUN for d in ${APP_DIR}/patches/*; do \
         if [ -d $d ]; then \
diff --git a/ckan/patches b/ckan/patches
deleted file mode 100644
index e69de29..0000000