diff --git a/README.org b/README.org
index fa97f28..43b0e3e 100644
--- a/README.org
+++ b/README.org
@@ -200,6 +200,7 @@ the ~custom-file~ as [[info:emacs#Saving Customizations][saving customizations (
        blacken                    ; Black Python code formatter client
        citar                      ; bibliography handling
        citeproc                   ; bibliography handling
+       code-cells                 ; lightweight notebooks in Emacs
        company                    ; complete anything
        company-anaconda           ; complete anything in anaconda-mode
        consult                    ; consult completing-read