diff --git a/gnu/packages/admin.scm b/gnu/packages/admin.scm
index ee037599a1..78db040294 100644
--- a/gnu/packages/admin.scm
+++ b/gnu/packages/admin.scm
@@ -2851,14 +2851,14 @@ done with the @code{auditctl} utility.")
 (define-public nmap
   (package
     (name "nmap")
-    (version "7.80")
+    (version "7.91")
     (source (origin
               (method url-fetch)
               (uri (string-append "https://nmap.org/dist/nmap-" version
                                   ".tar.bz2"))
               (sha256
                (base32
-                "1aizfys6l9f9grm82bk878w56mg0zpkfns3spzj157h98875mypw"))
+                "001kb5xadqswyw966k2lqi6jr6zz605jpp9w4kmm272if184pk0q"))
               (modules '((guix build utils)))
               (snippet
                '(begin
@@ -2934,6 +2934,7 @@ tool.  It is also useful for tasks such as network inventory, managing service
 upgrade schedules, and monitoring host or service uptime.  It also provides an
 advanced netcat implementation (ncat), a utility for comparing scan
 results (ndiff), and a packet generation and response analysis tool (nping).")
+    ;; See <https://github.com/nmap/nmap/issues/2199#issuecomment-792048244>.
     ;; This package uses nmap's bundled versions of libdnet and liblinear, which
     ;; both use a 3-clause BSD license.
     (license (list license:nmap license:bsd-3))))