diff --git a/pkgs/servers/mail/exim/cve-2017-16943.patch b/pkgs/servers/mail/exim/cve-2017-16943.patch
deleted file mode 100644
index 69ce9150723..00000000000
--- a/pkgs/servers/mail/exim/cve-2017-16943.patch
+++ /dev/null
@@ -1,39 +0,0 @@
-From 4e6ae6235c68de243b1c2419027472d7659aa2b4 Mon Sep 17 00:00:00 2001
-From: Jeremy Harris <jgh146exb@wizmail.org>
-Date: Fri, 24 Nov 2017 20:22:33 +0000
-Subject: [PATCH] Avoid release of store if there have been later allocations.
- Bug 2199
-
----
- src/receive.c | 7 ++++---
- 1 file changed, 4 insertions(+), 3 deletions(-)
-
-diff --git a/src/receive.c b/src/receive.c
-index e7e518a..d9b5001 100644
---- a/src/receive.c
-+++ b/src/receive.c
-@@ -1810,8 +1810,8 @@ for (;;)
-   (and sometimes lunatic messages can have ones that are 100s of K long) we
-   call store_release() for strings that have been copied - if the string is at
-   the start of a block (and therefore the only thing in it, because we aren't
--  doing any other gets), the block gets freed. We can only do this because we
--  know there are no other calls to store_get() going on. */
-+  doing any other gets), the block gets freed. We can only do this release if
-+  there were no allocations since the once that we want to free. */
-
-   if (ptr >= header_size - 4)
-     {
-@@ -1820,9 +1820,10 @@ for (;;)
-     header_size *= 2;
-     if (!store_extend(next->text, oldsize, header_size))
-       {
-+      BOOL release_ok = store_last_get[store_pool] == next->text;
-       uschar *newtext = store_get(header_size);
-       memcpy(newtext, next->text, ptr);
--      store_release(next->text);
-+      if (release_ok) store_release(next->text);
-       next->text = newtext;
-       }
-     }
---
-1.9.1
diff --git a/pkgs/servers/mail/exim/default.nix b/pkgs/servers/mail/exim/default.nix
index 79623247e3f..b02f80577fc 100644
--- a/pkgs/servers/mail/exim/default.nix
+++ b/pkgs/servers/mail/exim/default.nix
@@ -1,22 +1,13 @@
-{ coreutils, fetchurl, db, openssl, pcre, perl, pkgconfig, stdenv, fetchpatch }:
+{ coreutils, fetchurl, db, openssl, pcre, perl, pkgconfig, stdenv }:
 
 stdenv.mkDerivation rec {
-  name = "exim-4.89";
+  name = "exim-4.89.1";
 
   src = fetchurl {
     url = "http://ftp.exim.org/pub/exim/exim4/${name}.tar.xz";
-    sha256 = "09lndv34jsxwglq5zsh9y4xaqj5g37g9ca4x0zb25fvvm4f0lj8c";
+    sha256 = "157syn472gnp1x2lrazwdvqsg3zgwyv87952sq5rrnp220m3488s";
   };
 
-  patches = [
-    (fetchpatch {
-      name = "CVE-2017-1000369.patch";
-      url = "https://anonscm.debian.org/git/pkg-exim4/exim4.git/plain/debian/patches/79_CVE-2017-1000369.patch?h=4.89-2%2bdeb9u1";
-      sha256 = "0v46zywgkv1rdqhybqqrd0rwkdaj6q1f4x0a3vm9p0wz8vad3023";
-    })
-    ./cve-2017-16943.patch
-  ];
-
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ coreutils db openssl pcre perl ];