diff --git a/pymc_bart/__init__.py b/pymc_bart/__init__.py
index ed1a29a..36972b3 100644
--- a/pymc_bart/__init__.py
+++ b/pymc_bart/__init__.py
@@ -42,7 +42,7 @@
     "plot_variable_importance",
     "plot_variable_inclusion",
 ]
-__version__ = "0.9.0"
+__version__ = "0.9.1"
 
 
 pm.STEP_METHODS = list(pm.STEP_METHODS) + [PGBART]
diff --git a/requirements.txt b/requirements.txt
index 785de62..e3a38da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-pymc>=5.16.2, <=5.20.1
+pymc>=5.16.2, <=5.22.0
 arviz>=0.18.0
 numba
 matplotlib