diff --git a/core/core-projects.el b/core/core-projects.el
index 2bfa7a533..db0a9a09c 100644
--- a/core/core-projects.el
+++ b/core/core-projects.el
@@ -117,6 +117,9 @@ c) are not valid projectile projects."
       (when (and (bound-and-true-p projectile-projects-cache)
                  projectile-enable-caching
                  doom-interactive-p)
+        (setq projectile-known-projects
+              (cl-remove-if #'projectile-ignored-project-p
+                            projectile-known-projects))
         (projectile-cleanup-known-projects)
         (cl-loop with blacklist = (mapcar #'file-truename doom-projectile-cache-blacklist)
                  for proot in (hash-table-keys projectile-projects-cache)
@@ -125,7 +128,8 @@ c) are not valid projectile projects."
                             doom-projectile-cache-limit)
                         (member (substring proot 0 -1) blacklist)
                         (and doom-projectile-cache-purge-non-projects
-                             (not (doom-project-p proot))))
+                             (not (doom-project-p proot)))
+                        (projectile-ignored-project-p proot))
                  do (doom-log "Removed %S from projectile cache" proot)
                  and do (remhash proot projectile-projects-cache)
                  and do (remhash proot projectile-projects-cache-time)