diff --git a/CHANGELOG.md b/CHANGELOG.md
index c5842e0..ad1298f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Unreleased
+
+* [Enhancement] Support Tutor 19 and Open edX Sumac.
+
 ## Version 5.0.0 (2024-10-07)
 
 * Drop support for Python 3.8.
diff --git a/README.md b/README.md
index 18312fb..c5c363f 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ appropriate one:
 | Palm             | `>=16.0, <17`     | `quince`      | 3.x.x          |
 | Quince           | `>=17.0, <18`     | `quince`      | 3.x.x          |
 | Redwood          | `>=18.0, <19`     | `main`        | 5.x.x          |
+| Sumac            | `>=19.0, <20`     | `main`        | 5.x.x          |
 
 [^1]: For Open edX Maple and Tutor 13, you must run version 13.2.0 or
    later. That is because this plugin uses the Tutor v1 plugin API,
diff --git a/setup.py b/setup.py
index 47c442f..5844102 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@ def load_readme():
     packages=find_packages(exclude=["tests*"]),
     include_package_data=True,
     python_requires=">=3.9",
-    install_requires=["tutor <19, >=16.1.7"],
+    install_requires=["tutor <20, >=16.1.7"],
     setup_requires=["setuptools-scm"],
     entry_points={
         "tutor.plugin.v1": [