diff --git a/Readme.md b/Readme.md
index cc0ebc7..b637b57 100644
--- a/Readme.md
+++ b/Readme.md
@@ -3,3 +3,12 @@ ngtcp2 for Nim
 
 Wrapper around the [ngtcp2](https://github.com/ngtcp2/ngtcp2) C library for
 [Nim](https://nim-lang.org/).
+
+Updating to a newer version
+---------------------------
+
+Follow these steps when updating the wrapper to a newer version of ngtcp2:
+
+   1. update the git submodule in `sources/` to point to the new version
+   2. run `build.sh` (requires Nim and CMake to be installed)
+   3. commit the changes