diff --git a/data-lens.asd b/data-lens.asd
index 37c3d1d..55cf917 100644
--- a/data-lens.asd
+++ b/data-lens.asd
@@ -8,8 +8,7 @@
   :author "Edward Langley <el-cl@elangley.org>"
   :license "MIT"
   :depends-on (:cl-ppcre
-               :alexandria
-               :serapeum)
+               :alexandria)
   :serial t
   :components ((:file "package")
                (:file "optics")
diff --git a/optics.lisp b/optics.lisp
index 320bd73..8e9009b 100644
--- a/optics.lisp
+++ b/optics.lisp
@@ -151,7 +151,7 @@ contain the new value at the location focused by the lens."
       (fmap (lambda (new)
               (cons (cons key new)
                     alist))
-            (funcall cb (serapeum:assocdr key alist))))))
+            (funcall cb (cdr (assoc key alist)))))))
 
 (defun make-alist-lens (key)
   "A lens for updating a alist, discarding previous values"
@@ -162,7 +162,7 @@ contain the new value at the location focused by the lens."
                                        alist)
                                  :key #'car
                                  :from-end t))
-            (funcall cb (serapeum:assocdr key alist))))))
+            (funcall cb (cdr (assoc key alist)))))))
 
 (defun make-list-lens (index)
   "A lens for updating a sequence"
diff --git a/package.lisp b/package.lisp
index baf87bd..6bf308c 100644
--- a/package.lisp
+++ b/package.lisp
@@ -11,7 +11,6 @@
 
 (defpackage :data-lens
   (:use :cl)
-  (:import-from #:serapeum #:op #:defalias)
   (:export #:regex-match #:include #:exclude #:pick #:key-transform
            #:combine #:derive #:cumsum #:over #:on #:shortcut
            #:defun-ct #:key #:extract-key #:element #:let-fn #:juxt