diff --git a/pyproject.toml b/pyproject.toml
index b9e2577..a9e3c18 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,12 @@ authors = [{ name = "Mr Finchum" }]
 description = "User interface for optima35."
 readme = "pip_README.md"
 requires-python = ">=3.8"
-dependencies = ["optima35>=1.0.0, <2.0.0", "pyside6", "PyYAML"]
+dependencies = [
+    "optima35>=1.0.0, <2.0.0",
+    "PyPyUpdater>=0.3.0, <1.0.0",
+    "pyside6",
+    "PyYAML",
+]
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",
diff --git a/src/pyproject.toml b/src/pyproject.toml
index 0b86791..4e3097a 100644
--- a/src/pyproject.toml
+++ b/src/pyproject.toml
@@ -8,7 +8,7 @@ dynamic = ["version"]
 authors = [{ name = "Mr Finchum" }]
 description = "User interface for optima35."
 requires-python = ">=3.8"
-dependencies = ["optima35>=1.0.0, <2.0.0", "PyYAML"]
+dependencies = ["optima35>=1.0.0, <2.0.0", "PyYAML", "PyPyUpdater"]
 classifiers = [
     "Programming Language :: Python :: 3",
     "License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",