diff --git a/README.md b/README.md
index 7c1a8487..7d7a1a0f 100644
--- a/README.md
+++ b/README.md
@@ -29,10 +29,11 @@ Python 3.7+ (3.6 users get version 2.4). See [what's new](https://hist.readthedo
 You can install this library from [PyPI](https://pypi.org/project/hist/) with pip:
 
 ```bash
-python3 -m pip install "hist[plot]"
+python3 -m pip install "hist[plot,fit]"
 ```
 
-If you do not need the plotting features, you can skip the `[plot]` extra.
+If you do not need the plotting features, you can skip the `[plot]` and/or
+`[fit]` extras. `[fit]` is not currently supported in WebAssembly.
 
 ## Features
 
diff --git a/pyproject.toml b/pyproject.toml
index 6203b801..c6b58675 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -60,6 +60,8 @@ mpl = [
 plot = [
     "matplotlib >=3.0",
     "mplhep >=0.2.16",
+]
+fit = [
     "scipy >=1.4",
     "iminuit >=2",
 ]
diff --git a/src/hist/plot.py b/src/hist/plot.py
index 46ab9a82..d69c7ebc 100644
--- a/src/hist/plot.py
+++ b/src/hist/plot.py
@@ -32,7 +32,7 @@
     "plot_stack",
 )
 
-_PLT_MISSING_MSG = "Hist plotting with fitting requires scipy and iminuit. Please install hist[plot] or manually install dependencies."
+_PLT_MISSING_MSG = "Hist plotting with fitting requires scipy and iminuit. Please install hist[plot,fit] or manually install dependencies."
 
 
 class FitResultArtists(NamedTuple):