diff --git a/units-test/units-test.cabal b/units-test/units-test.cabal
index 344e99c..cc9a193 100644
--- a/units-test/units-test.cabal
+++ b/units-test/units-test.cabal
@@ -50,7 +50,7 @@ test-suite main
                     , containers >= 0.4
                     , units-parser >= 0.1 && < 1.0
                     , lens >= 4 && < 6
-                    , deepseq >= 1.1.0.0 && < 1.5
+                    , deepseq >= 1.1.0.0 && < 1.6
   else
     build-depends:    units
                     , units-defs
@@ -70,7 +70,7 @@ test-suite main
                     , containers >= 0.4
                     , units-parser >= 0.1 && < 1.0
                     , lens >= 4 && < 6
-                    , deepseq >= 1.1.0.0 && < 1.5
+                    , deepseq >= 1.1.0.0 && < 1.6
                     , nats >= 0.1
                        -- only really for GHC 7.8, before base had Numeric.Natural
                        -- but we depend on this indirectly, so adding it here is free
diff --git a/units/units.cabal b/units/units.cabal
index d4ef93c..8011a8f 100644
--- a/units/units.cabal
+++ b/units/units.cabal
@@ -63,7 +63,7 @@ library
                  , containers >= 0.4
                  , units-parser >= 0.1 && < 1.0
                  , lens >= 4 && < 6
-                 , deepseq >= 1.1.0.0 && < 1.5
+                 , deepseq >= 1.1.0.0 && < 1.6
   else
     build-depends: base >= 4.7 && < 5
                  , th-desugar >= 1.5.4
@@ -78,7 +78,7 @@ library
                  , containers >= 0.4
                  , units-parser >= 0.1 && < 1.0
                  , lens >= 4 && < 6
-                 , deepseq >= 1.1.0.0 && < 1.5
+                 , deepseq >= 1.1.0.0 && < 1.6
   exposed-modules:
     Data.Metrology,
     Data.Metrology.Internal,