diff --git a/CHANGES b/CHANGES
index 74d9b1d2..456fc115 100644
--- a/CHANGES
+++ b/CHANGES
@@ -31,7 +31,7 @@ Fixes
 
 DeprecationWarning
   - The default MBAR error estimator in workflow.ABFE.estimate will change from
-  analytic to bootstrap=50 (issue #320, PR#322).
+    analytic to bootstrap=50 in 2.2.0 (issue #320, PR#322).
 
 
 06/04/2023 xiki-tempula
diff --git a/src/alchemlyb/workflows/abfe.py b/src/alchemlyb/workflows/abfe.py
index 25197020..736f51ac 100644
--- a/src/alchemlyb/workflows/abfe.py
+++ b/src/alchemlyb/workflows/abfe.py
@@ -404,7 +404,7 @@ def estimate(self, estimators=("MBAR", "BAR", "TI"), **kwargs):
             no unit conversion has been attempted.
 
         .. versionchanged:: 2.1.0
-        DeprecationWarning for using analytic error for MBAR estimator.
+            DeprecationWarning for using analytic error for MBAR estimator.
 
         """
         # Make estimators into a tuple