diff --git a/irmin-pack-tools.opam b/irmin-pack-tools.opam
index 6b5ae8bc04..31d1a332e8 100644
--- a/irmin-pack-tools.opam
+++ b/irmin-pack-tools.opam
@@ -25,7 +25,6 @@ depends: [
   "cmdliner"    {>= "1.1.0"}
   "cmdliner"    {>= "1.1.0"}
   "notty"       {>= "0.2.3"}
-  "prettree"
   "ppx_repr"    {>= "0.7.0"}
   "ptime"
   "hex"
@@ -33,10 +32,6 @@ depends: [
   "alcotest"    {with-test}
 ]
 
-pin-depends: [
-  ["prettree.dev"  "git+https://github.com/art-w/prettree.git#568de08442f02dd87acc84ca6a91cc661b7e77bf"]
-]
-
 synopsis: "Utils for Irmin-pack"
 description: """
 `Irmin-pack-tools` defines useful binaries and libraries for
diff --git a/src/irmin-pack-tools/README.md b/src/irmin-pack-tools/README.md
index a13bb6b434..a90b2e6973 100644
--- a/src/irmin-pack-tools/README.md
+++ b/src/irmin-pack-tools/README.md
@@ -5,7 +5,7 @@ Currently, there are the following tools:
 - [`ppcf`](#ppcf), a json printer for control files
 - [`ppidx`](#ppidx), a json printer for index folders
 - [`tezos-explorer`](#tezos-explorer), a notty ui for a fast exploration of tezos stores
-- [`tezos-explorer-gyu`](#tezos-explorer-gui), a graphical ui for a fast exploration of tezos stores
+- [`tezos-explorer-gui`](#tezos-explorer-gui), a graphical ui for a fast exploration of tezos stores
 
 ## ppcf
 This tool prints a control file in a human readable manner (json), allowing to fetch important informations easily.
@@ -104,8 +104,9 @@ $ jq -s 'sort_by(.off)' -- index
 TODO
 
 ## tezos-explorer-gui
-This tool is a graphical UI, meant to allow the user to figure out rapidly the shape of a commit, giving him informations on it's content.
+This tool is a graphical UI, meant to allow the user to figure out rapidly the shape of a commit, giving them informations on its content.
 In order to launch it, uncomment the `dune` file under the path `src/irmin-pack-tools/tezos_explorer_gui` and install the deps `tsdl` and `tsdl-ttf`.
+You will also need to pin the package `prettree` with `git+https://github.com/art-w/prettree.git#568de08442f02dd87acc84ca6a91cc661b7e77bf`.
 It can be launched using the following command:
 ```shell
 $ dune exec -- irmin-tezos-explorer-gui <path-to-store> <path-to-ttf-font> <commit>
@@ -115,7 +116,7 @@ The first argument is the path to the root of the store (e.g. `output/root/`).
 
 The second argument is the path to a `.ttf` file, necessary to know which font to use when printing strings.
 
-The third argument is an int, the `nth` commit stored in the index of the store that will be showned first.
+The third argument is an int, the `nth` commit stored in the index of the store that will be shown first.
 
 Once the program is launched, you can:
 - Navigate through the indexed commits using the left and right arrows.