diff --git a/Dockerfile b/Dockerfile
index 2d47dc48c6dc92673b80e622df027073cc95ccf2..c185deb8a1e34d276f0ae96903641a90d0e7af70 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM ubuntu:oracular
 
-RUN apt update && apt install -y ca-certificates openssh-server python3-pip python3-dev xxd \
+RUN apt update && apt install -y ca-certificates openssh-server python3-pip python3-dev xxd file  \
                                 libssl-dev libffi-dev build-essential binutils-multiarch git gdb gdb-multiarch ltrace strace tmux wget curl && \
                                 apt clean && rm -rf /var/lib/apt/lists/* && touch /root/.hushlogin
 
diff --git a/README.md b/README.md
index 4ef3e3a0fac3193633029f2a9fcfb4337ef24e61..efe03fff59863dae632423686ac1b250b59634cd 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,7 @@ There are probably way more useful tools, but here's a list to get started.
 
 ```bash
 sudo apt install -y xxd gdb gdb-multiarch gdbserver binutils binutils-multiarch \
-    tmux wget curl socat strace ltrace git git-lfs \
+    tmux wget curl socat strace ltrace git git-lfs file \
 ```
 
 ### pwndbg