diff --git a/pkgs/development/libraries/haskell/diagrams/core.nix b/pkgs/development/libraries/haskell/diagrams/core.nix
index 8c6a87b7e05..dbbc3c030b5 100644
--- a/pkgs/development/libraries/haskell/diagrams/core.nix
+++ b/pkgs/development/libraries/haskell/diagrams/core.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "diagrams-core";
-  version = "1.1.0.3";
-  sha256 = "0kl4bc5mvly227rzalzy9q6ki321drcdfsjqriv3ac70qmcfqyma";
+  version = "1.2";
+  sha256 = "0qlkick9ppwaignh179w65gmiq5as1nsi1ymficdw1p0jldi5f51";
   buildDepends = [
     dualTree lens MemoTrie monoidExtras newtype semigroups vectorSpace
     vectorSpacePoints