diff --git a/docs/rtd_environment.yml b/docs/rtd_environment.yml
index 9beb280c..439da479 100644
--- a/docs/rtd_environment.yml
+++ b/docs/rtd_environment.yml
@@ -25,7 +25,7 @@ dependencies:
   - networkx >=2.4
   - pluggy
   - pony >=0.7.15
-  - pybaum
+  - pybaum >=0.1.1
   - pexpect
   - rich
   - tomli >=1.0.0
diff --git a/docs/source/changes.md b/docs/source/changes.md
index be3ae4f5..b3f2b6ae 100644
--- a/docs/source/changes.md
+++ b/docs/source/changes.md
@@ -5,7 +5,11 @@ chronological order. Releases follow [semantic versioning](https://semver.org/)
 releases are available on [PyPI](https://pypi.org/project/pytask) and
 [Anaconda.org](https://anaconda.org/conda-forge/pytask).
 
-## 0.2.4 - 2022-xx-xx
+## 0.2.5 - 2022-xx-xx
+
+- {pull}`288` fixes pinning pybaum to v0.1.1 or a version that supports `tree_yield()`.
+
+## 0.2.4 - 2022-06-28
 
 - {pull}`279` enhances some tutorials with spell and grammar checking.
 - {pull}`282` updates the tox configuration.
diff --git a/environment.yml b/environment.yml
index d8e23bbc..b54e6626 100644
--- a/environment.yml
+++ b/environment.yml
@@ -22,7 +22,7 @@ dependencies:
   - networkx >=2.4
   - pluggy
   - pony >=0.7.15
-  - pybaum
+  - pybaum >=0.1.1
   - rich
   - tomli >=1.0.0
   - tomli-w >=1.0.0
diff --git a/setup.cfg b/setup.cfg
index 837c54e3..d988d89f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -41,7 +41,7 @@ install_requires =
     packaging
     pluggy
     pony>=0.7.15
-    pybaum
+    pybaum>=0.1.1
     rich
     tomli>=1.0.0
     tomli-w>=1.0.0
diff --git a/tox.ini b/tox.ini
index fbde181f..40264045 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,7 @@ conda_deps =
     networkx >=2.4
     pluggy
     pony >=0.7.15
-    pybaum
+    pybaum >=0.1.1
     rich
     tomli >=1.0.0
     tomli-w >=1.0.0