diff --git a/docs/ftldns/compile.md b/docs/ftldns/compile.md
index 317bdaa..4684fbf 100644
--- a/docs/ftldns/compile.md
+++ b/docs/ftldns/compile.md
@@ -27,16 +27,34 @@ sudo dnf install git wget ca-certificates gcc gmp-devel gmp-static m4 cmake libi
 Compile and install a recent version using:
 
 ```bash
-wget https://ftp.gnu.org/gnu/nettle/nettle-3.8.1.tar.gz
-tar -xzf nettle-3.8.1.tar.gz
-cd nettle-3.8.1
-./configure --libdir=/usr/local/lib
+wget https://ftp.gnu.org/gnu/nettle/nettle-3.9.tar.gz
+tar -xzf nettle-3.9.tar.gz
+cd nettle-3.9
+./configure --libdir=/usr/local/lib --enable-static --disable-shared --disable-openssl --disable-mini-gmp -disable-gcov --disable-documentation
 make -j $(nproc)
 sudo make install
 ```
 
 Since Ubuntu 20.04, you need to specify the library directory explicitly. Otherwise, the library will be installed in custom locations where it would not be found by `cmake`.
 
+## Compile `libmbedtls` from source
+
+*FTL*DNS uses another cryptographic library (`libmbedtls`) containing cryptographic primitives, X.509 certificate manipulation and the SSL/TLS and DTLS protocols used for serving the web interface and the API over HTTPS.
+
+Compile and install a recent version using:
+
+```bash
+wget https://github.com/Mbed-TLS/mbedtls/archive/refs/tags/v3.4.1.tar.gz -O mbedtls-3.4.1.tar.gz
+tar -xzf mbedtls-3.4.1.tar.gz
+cd mbedtls-3.4.1
+sed -i '/#define MBEDTLS_THREADING_C/s*^//**g' include/mbedtls/mbedtls_config.h
+sed -i '/#define MBEDTLS_THREADING_PTHREAD/s*^//**g' include/mbedtls/mbedtls_config.h
+make -j $(nproc)
+sudo make install
+```
+
+The `sed` commands are necessary to enable multi-threading support in `libmbedtls` as there is no `configure` script to do this for us (see also [here](https://github.com/Mbed-TLS/mbedtls#configuration)).
+
 ## Get the source
 
 Now, clone the *FTL*DNS repo (or your own fork) to get the source code of *FTL*DNS:
@@ -48,7 +66,7 @@ git clone https://github.com/pi-hole/FTL.git && cd FTL
 If you want to build another branch and not `master`, use checkout to get to this branch, like
 
 ```bash
-git checkout development
+git checkout development-v6
 ```
 
 ## Compile the source