diff --git a/README.org b/README.org
index dd7b76e..f570303 100644
--- a/README.org
+++ b/README.org
@@ -414,6 +414,7 @@ Expands into a call to ~org-ql-select~ with the same arguments.  For convenience
 +  Selectors ~(children)~ and ~(descendants)~.
 +  Function ~org-ql-search~ and macro ~org-ql-agenda~ accept a ~:title~ argument, which is displayed in the header.
 +  Command ~org-ql-search~ offers global ~org-super-agenda-groups~ in completion.
++  Customization group ~org-ql~.
 
 *Changed*
 +  Function ~org-ql-query~ renamed to ~org-ql-select~.  ~org-ql-query~ now refers to a new function.
diff --git a/org-ql-agenda.el b/org-ql-agenda.el
index ba24e1f..7a37646 100644
--- a/org-ql-agenda.el
+++ b/org-ql-agenda.el
@@ -52,7 +52,8 @@
 
 (defface org-ql-agenda-due-date
   '((t (:slant italic :weight bold)))
-  "Face for due dates in `org-ql-agenda' views.")
+  "Face for due dates in `org-ql-agenda' views."
+  :group 'org-ql)
 
 ;;;; Variables
 
diff --git a/org-ql.el b/org-ql.el
index 9c5cfc7..bb9e392 100644
--- a/org-ql.el
+++ b/org-ql.el
@@ -95,6 +95,13 @@ hash table, keyed by arguments passed to
   "Plist of predicates, their corresponding functions, and their docstrings.
 This list should not contain any duplicates.")
 
+;;;; Customization
+
+(defgroup org-ql nil
+  "Customization for `org-ql'."
+  :group 'org
+  :link '(url-link "https://github.com/alphapapa/org-ql"))
+
 ;;;; Macros
 
 (cl-defmacro org-ql--defpred (name args docstring &rest body)