diff --git a/modules/tools/lookup/config.el b/modules/tools/lookup/config.el
index 66b0aee06..254480560 100644
--- a/modules/tools/lookup/config.el
+++ b/modules/tools/lookup/config.el
@@ -138,6 +138,17 @@ this list.")
         dash-docs-min-length 2
         dash-docs-browser-func #'eww)
 
+  ;; Fixes integer-or-marker-p errors emitted from Emacs' url library,
+  ;; particularly, the `url-retrieve-synchronously' call in
+  ;; `dash-docs-read-json-from-url'. This is part of a systemic issue with Emacs
+  ;; 26's networking library (fixed in Emacs 27+, apparently).
+  ;;
+  ;; See https://github.com/magit/ghub/issues/81
+  (defun doom*dash-docs-read-json-from-url (orig-fn url)
+    (let ((gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3"))
+      (funcall orig-fn url)))
+  (advice-add #'dash-docs-read-json-from-url :around #'doom*dash-docs-read-json-from-url)
+
   (def-package! helm-dash
     :when (featurep! :completion helm))