diff --git a/README.md b/README.md
index fe55d7b5..a1c9ffab 100644
--- a/README.md
+++ b/README.md
@@ -239,6 +239,8 @@ You can also quantize the weights with bitsandbytes to reduce the VRAM requireme
 make run-bloom-quantize # Requires 8xA100 40GB
 ```
 
+4bit quantization is available using the [NF4 and FP4 data types from bitsandbytes](https://arxiv.org/pdf/2305.14314.pdf). It can be enabled by providing `--quantize bitsandbytes-nf4` or `--quantize bitsandbytes-fp4` as a command line argument to `text-generation-launcher`.
+
 ## Develop
 
 ```shell
diff --git a/launcher/src/main.rs b/launcher/src/main.rs
index 36add771..98c5a0aa 100644
--- a/launcher/src/main.rs
+++ b/launcher/src/main.rs
@@ -104,7 +104,8 @@ struct Args {
     num_shard: Option<usize>,
 
     /// Whether you want the model to be quantized. This will use `bitsandbytes` for
-    /// quantization on the fly, or `gptq`. 
+    /// quantization on the fly, or `gptq`. 4bit quantization is available through 
+    /// `bitsandbytes` by providing the `bitsandbytes-fp4` or `bitsandbytes-nf4` options.
     #[clap(long, env, value_enum)]
     quantize: Option<Quantization>,