diff --git a/README.md b/README.md
index 9d436f3..f28e0c4 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ Installers for the following tools are included:
 | binary | [hongfuzz](https://github.com/google/honggfuzz) | A general-purpose, easy-to-use fuzzer with interesting analysis options. | <!--tool--><!--test-->
 | binary | [libheap](https://github.com/cloudburst/libheap) | gdb python library for examining the glibc heap (ptmalloc) | <!--tool--><!--no-test-->
 | binary | [miasm](https://github.com/cea-sec/miasm) | Reverse engineering framework in Python. | <!--tool--> <!--test-->
+| binary | [one_gadget](https://github.com/david942j/one_gadget) | Magic gadget search for libc. | <!--tool--> <!--test-->
 | binary | [panda](https://github.com/moyix/panda) | Platform for Architecture-Neutral Dynamic Analysis. | <!--tool--><!--no-test-->
 | binary | [pathgrind](https://github.com/codelion/pathgrind) | Path-based, symbolically-assisted fuzzer. | <!--tool--><!--failing-->
 | binary | [peda](https://github.com/longld/peda) | Enhanced environment for gdb. | <!--tool--><!--test-->
diff --git a/one_gadget/install b/one_gadget/install
new file mode 100755
index 0000000..095072c
--- /dev/null
+++ b/one_gadget/install
@@ -0,0 +1,27 @@
+#!/bin/bash -ex
+
+gem install --user-install one_gadget
+
+GEM_BIN_PATH=$(gem environment | grep "USER INSTALL" | awk -F ': ' '{ print $2 }')/bin
+
+MAGIC="# ctf-tools: gem install"
+for f in ~/.bashrc ~/.zshrc; do
+    if [[ -e "$f" ]]; then
+        if ! grep "$MAGIC" "$f" >/dev/null 2>&1; then
+            cat >> "$f" << EOF
+$MAGIC
+export PATH=\$PATH:$GEM_BIN_PATH
+EOF
+        fi
+    fi
+done
+
+f=~/.config/fish/config.fish
+if [[ -e "$f" ]]; then
+    if ! grep "$MAGIC" "$f" >/dev/null 2>&1; then
+        cat >> "$f" << EOF
+$MAGIC
+set -x PATH \$PATH $GEM_BIN_PATH
+EOF
+    fi
+fi