diff --git a/docker/Dockerfile b/docker/Dockerfile
index 6a9f4f1..f8c72bf 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -53,6 +53,7 @@ USER user
 # Install AFL
 RUN wget http://lcamtuf.coredump.cx/afl/releases/afl-latest.tgz \
     && tar -xzvf afl-latest.tgz \
+    && rm -rf afl-latest.tgz \
     && cd afl-2.52b/ \
     && make \
     && sudo make install