diff --git a/Stackage/Config.hs b/Stackage/Config.hs
index da888687..599149c4 100644
--- a/Stackage/Config.hs
+++ b/Stackage/Config.hs
@@ -596,6 +596,9 @@ defaultStablePackages ghcVer requireHP = unPackageMap $ execWriter $ do
     -- https://github.com/fpco/stackage/issues/319
     addRange "Michael Snoyman" "polyparse" "< 1.10"
 
+    -- https://github.com/fpco/stackage/issues/320
+    addRange "Michael Snoyman" "lens" "< 4.5"
+
     when (ghcVer == GhcMajorVersion 7 8 && requireHP) $ do
         -- Yay workarounds for unnecessarily old versions
         let peg x y = addRange "Haskell Platform" x y