diff --git a/lens/applicable.rkt b/lens/applicable.rkt
index 3b518f9..78e233d 100644
--- a/lens/applicable.rkt
+++ b/lens/applicable.rkt
@@ -3,7 +3,7 @@
 (provide (all-from-out "main.rkt"))
 
 (require "main.rkt"
-         (only-in "core/base.rkt" use-applicable-lenses!))
+         (only-in "base/base.rkt" use-applicable-lenses!))
 
 (module+ test
   (require rackunit))
diff --git a/lens/hash.rkt b/lens/hash.rkt
index b6febc9..1e7acae 100644
--- a/lens/hash.rkt
+++ b/lens/hash.rkt
@@ -3,7 +3,7 @@
 (provide hash-ref-lens)
 
 (require fancy-app
-         "core/main.rkt")
+         "base/main.rkt")
 
 (module+ test
   (require rackunit))
diff --git a/lens/main.rkt b/lens/main.rkt
index ef585d9..ff2e1f8 100644
--- a/lens/main.rkt
+++ b/lens/main.rkt
@@ -9,7 +9,7 @@
 (provide
  (except-out
   (all-from-out
-   "core/main.rkt"
+   "base/main.rkt"
    "list/main.rkt"
    "syntax.rkt"
    "syntax-keyword.rkt")