diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 88557fba1626..12c6d1bcbfdd 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -1197,8 +1197,8 @@ self: super: {
   temporary-resourcet = doJailbreak super.temporary-resourcet;
 
   # Requires dhall >= 1.23.0
-  ats-pkg = super.ats-pkg.override { dhall = self.dhall_1_25_0; };
-  dhall-to-cabal = super.dhall-to-cabal.override { dhall = self.dhall_1_25_0; };
+  ats-pkg = super.ats-pkg.override { dhall = self.dhall_1_26_0; };
+  dhall-to-cabal = super.dhall-to-cabal.override { dhall = self.dhall_1_26_0; };
 
   # Test suite doesn't work with current QuickCheck
   # https://github.com/pruvisto/heap/issues/11
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 88ec8ad85ff0..5db25686fc66 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -589,7 +589,7 @@ self: super: builtins.intersectAttrs super {
   snap-server = dontCheck super.snap-server;
 
   # Tests require internet
-  dhall_1_25_0 = dontCheck super.dhall_1_25_0;
+  dhall_1_26_0 = dontCheck super.dhall_1_26_0;
   http-download = dontCheck super.http-download;
   pantry = dontCheck super.pantry;