diff --git a/lisp/oc-basic.el b/lisp/oc-basic.el
index 6d625e4a5..66f8c069f 100644
--- a/lisp/oc-basic.el
+++ b/lisp/oc-basic.el
@@ -65,7 +65,10 @@
 ;;; Code:
 
 (require 'bibtex)
+(require 'json)
 (require 'oc)
+(require 'org)
+(require 'seq)
 
 (declare-function org-open-at-point "org" (&optional arg))
 
diff --git a/lisp/oc.el b/lisp/oc.el
index 53eafb3bd..f8cc7829c 100644
--- a/lisp/oc.el
+++ b/lisp/oc.el
@@ -57,6 +57,7 @@
 
 (require 'org-compat)
 (require 'org-macs)
+(require 'seq)
 
 (declare-function org-at-heading-p "org" (&optional _))
 (declare-function org-collect-keywords "org" (keywords &optional unique directory))