diff --git a/chromium-85.0.4183.102-invalid-end-CookieMonster-53478ca.patch b/chromium-85.0.4183.102-invalid-end-CookieMonster-53478ca.patch
new file mode 100644
index 00000000..34dd4f40
--- /dev/null
+++ b/chromium-85.0.4183.102-invalid-end-CookieMonster-53478ca.patch
@@ -0,0 +1,30 @@
+diff -up chromium-85.0.4183.102/net/cookies/cookie_monster.cc.fixme chromium-85.0.4183.102/net/cookies/cookie_monster.cc
+--- chromium-85.0.4183.102/net/cookies/cookie_monster.cc.fixme	2020-09-21 14:52:06.606722391 -0400
++++ chromium-85.0.4183.102/net/cookies/cookie_monster.cc	2020-09-21 14:53:40.247366159 -0400
+@@ -1151,9 +1151,14 @@ CookieMonster::CookieMap::iterator Cooki
+   // |num_keys_| counter.
+   bool different_prev =
+       inserted == cookies_.begin() || std::prev(inserted)->first != key;
+-  bool different_next =
+-      inserted == cookies_.end() || std::next(inserted)->first != key;
+-  if (different_prev && different_next)
++  // According to std::multiqueue documentation:
++  // "If the container has elements with equivalent key, inserts at the upper
++  // bound of that range. (since C++11)"
++  // This means that "inserted" iterator either points to the last element in
++  // the map, or the element succeeding it has to have different key.
++  DCHECK(std::next(inserted) == cookies_.end() ||
++         std::next(inserted)->first != key);
++  if (different_prev)
+     ++num_keys_;
+ 
+   return inserted;
+@@ -1373,7 +1378,7 @@ void CookieMonster::InternalDeleteCookie
+   bool different_prev =
+       it == cookies_.begin() || std::prev(it)->first != it->first;
+   bool different_next =
+-      it == cookies_.end() || std::next(it)->first != it->first;
++      std::next(it) == cookies_.end() || std::next(it)->first != it->first;
+   if (different_prev && different_next)
+     --num_keys_;
+ 
diff --git a/chromium.spec b/chromium.spec
index 4469864f..231f297a 100644
--- a/chromium.spec
+++ b/chromium.spec
@@ -177,7 +177,7 @@ Name:		chromium%{chromium_channel}%{nsuffix}
 %else
 Name:		chromium%{chromium_channel}
 %endif
-Version:	%{majorversion}.0.4183.102
+Version:	%{majorversion}.0.4183.121
 Release:	1%{?dist}
 %if %{?freeworld}
 %if %{?shared}
@@ -285,7 +285,8 @@ Patch80:	chromium-85-DelayNode-cast.patch
 Patch81:	chromium-85-NearbyShareEncryptedMetadataKey-include.patch
 # https://chromium.googlesource.com/chromium/src/+/17edd5225a9e6a388a9560efe20362a1a0d86694
 Patch82:	chromium-85.0.4183.83-gcc-not-auto.patch
-
+# https://github.com/chromium/chromium/commit/53478caee862624fc6d73516f8d64253854b146f
+Patch83:	chromium-85.0.4183.102-invalid-end-CookieMonster-53478ca.patch
 
 # Use lstdc++ on EPEL7 only
 Patch101:	chromium-75.0.3770.100-epel7-stdc++.patch
@@ -905,6 +906,7 @@ udev.
 %patch80 -p1 -b .DelayNode-cast
 %patch81 -p1 -b .NearbyShareEncryptedMetadataKey-include
 %patch82 -p1 -b .gcc-not-auto
+%patch83 -p1 -b .invalid-end-CookieMonster
 
 # Fedora branded user agent
 %if 0%{?fedora}
@@ -1922,6 +1924,10 @@ getent group chrome-remote-desktop >/dev/null || groupadd -r chrome-remote-deskt
 
 
 %changelog
+* Mon Sep 21 2020 Tom Callaway <spot@fedoraproject.org> - 85.0.4183.121-1
+- update to 85.0.4183.121
+- apply upstream fix for networking issue with CookieMonster
+
 * Tue Sep  8 2020 Tom Callaway <spot@fedoraproject.org> - 85.0.4183.102-1
 - update to 85.0.4183.102
 - install ANGLE so files (libEGL.so, libGLESv2.so)
diff --git a/sources b/sources
index 8c453ea3..385a1d8d 100644
--- a/sources
+++ b/sources
@@ -20,4 +20,4 @@ SHA512 (xcb-proto-1.14.tar.xz) = de66d568163b6da2be9d6c59984f3afa3acd119a7813786
 SHA512 (depot_tools.git-master.tar.gz) = dc323888812b66cc92c53a24a8a58ccf9e2961be67aa21852bd091b8b49569071f06ae9104cb58950e6253ac3a29f0db0663e9f35ef2b1ea28696efb38b42708
 SHA512 (NotoSansSymbols2-Regular.ttf) = 2644b42c3fdccfe12395f9b61553aced169a0f1dc09f5a0fd7898e9d0a372ee4422b6b1cdab3c86ecc91db437e9ae8a951e64e85edc3ac9e9fca428852dbb2ad
 SHA512 (NotoSansTibetan-Regular.ttf) = fb5a48fcaea80eebe7d692f6fcf00d59d47658a358d0ec8e046fc559873f88bd595b2da474d2826abd9e9305f3741c69058d867b1e6048f37fe7d71b5d3af36a
-SHA512 (chromium-85.0.4183.102-clean.tar.xz) = 5a08d61061b226fa8f88641b47706707822280e137518cd3cc7837089a7207a9c003821a6a3b901e275587d6f7fd2dbdc5a3ae66291d4a3e8e574ecb2742cfa6
+SHA512 (chromium-85.0.4183.121-clean.tar.xz) = 32d91d91c4fee52b278b18eaa757c1cea069e77c3aa577311a8c47f3d2136f4cd814250ff81f8e296b45ab15ce2fdfb2aff00676ca69ecc38d7e1019d61885c0