diff --git a/README.md b/README.md
index b18c53d..273a5e3 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,17 @@
 
 ## Install
 
-> TBD
+> **This package is not yet released.**
+>
+> ```bash
+> pip install ipyprofiler
+> ```
+>
+> To also install optional python-specific integration:
+>
+> ```bash
+> pip install ipyprofiler[pyinstrument]
+> ```
 
 ## Screenshots
 
diff --git a/examples/files/requirements.txt b/examples/files/requirements.txt
index 6307973..43b3773 100644
--- a/examples/files/requirements.txt
+++ b/examples/files/requirements.txt
@@ -1,3 +1,2 @@
-pyinstrument
 ipywidgets
-ipyprofiler
+ipyprofiler[pyinstrument]
diff --git a/pyproject.toml b/pyproject.toml
index 5536dec..bca9e23 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,12 @@ name = "ipyprofiler"
 description = "Jupyter Widgets for visualizing profiler data."
 version = "0.1.0"
 requires-python = ">=3.9"
-dependencies = ["traitlets >=5.1", "ipywidgets >=7,<9"]
+dependencies = [
+  "ipywidgets >=7,<9",
+  "jinja2 >=3.0.3",
+  "traitlets >=5.1",
+]
+optional-dependencies.pyinstrument = ["pyinstrument >=4.6.1"]
 authors = [{name = "ipyprofiler contributors"}]
 readme = "README.md"
 classifiers = [