diff --git a/Dockerfile b/Dockerfile
index f625d52..003937b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,6 +16,7 @@ RUN set -ex; \
   \
   SCALA_BINARY_VERSION=$(echo $SCALA_VERSION | cut -f 1-2 -d '.'); \
   mkdir -p /opt/kafka; \
+  chmod a+w /opt/kafka; \
   curl -s -L  -o kafka_$SCALA_BINARY_VERSION-$KAFKA_VERSION.tgz.asc https://archive.apache.org/dist/kafka/$KAFKA_VERSION/kafka_$SCALA_BINARY_VERSION-$KAFKA_VERSION.tgz.asc; \
   curl -SLs -o kafka_$SCALA_BINARY_VERSION-$KAFKA_VERSION.tgz "https://archive.apache.org/dist/kafka/$KAFKA_VERSION/kafka_$SCALA_BINARY_VERSION-$KAFKA_VERSION.tgz"; \
   gpg --verify kafka_$SCALA_BINARY_VERSION-$KAFKA_VERSION.tgz.asc kafka_$SCALA_BINARY_VERSION-$KAFKA_VERSION.tgz; \