diff --git a/Dockerfile b/Dockerfile
index 874e58d..7469b9d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@ RUN \
   echo $ADDITIONAL_CA_URL &&\
   echo $ADDITIONAL_CA_CHECKSUM &&\
   if [ "$ADDITIONAL_CA_URL" != "x" ]; then \
-    cd /usr/share/ca-certificates; \
+    cd /usr/local/share/ca-certificates; \
     wget --no-check-certificate -O custom-ca.crt $ADDITIONAL_CA_URL; \
     echo "$ADDITIONAL_CA_CHECKSUM  custom-ca.crt" | md5sum -c; \
     /usr/sbin/update-ca-certificates; \