diff --git a/example/docker/fedora40/Dockerfile b/example/docker/fedora40/Dockerfile
index 32226d9..990db34 100644
--- a/example/docker/fedora40/Dockerfile
+++ b/example/docker/fedora40/Dockerfile
@@ -5,7 +5,8 @@ RUN echo root:1234 | chpasswd
 
 RUN dnf -y update && \
     dnf -y install  \
-    automake binutils gcc gcc-c++ git kernel-devel lsb-release make openssh-server openssl-devel patchelf wget
+    automake binutils gcc gcc-c++ git kernel-devel lsb-release make openssh-server openssl-devel patchelf wget \
+    && dnf clean all
 
 RUN wget "https://github.com/Kitware/CMake/releases/download/v3.30.3/cmake-3.30.3-linux-x86_64.sh" -O cmake.sh && \
     chmod +x cmake.sh && \