diff --git a/exercises/hamming/package.yaml b/exercises/hamming/package.yaml
index 171179b05..2f43e5270 100644
--- a/exercises/hamming/package.yaml
+++ b/exercises/hamming/package.yaml
@@ -1,5 +1,5 @@
 name: hamming
-version: 2.2.0.9
+version: 2.3.0.10
 
 dependencies:
   - base
diff --git a/exercises/hamming/test/Tests.hs b/exercises/hamming/test/Tests.hs
index 61367baa4..480cbce55 100644
--- a/exercises/hamming/test/Tests.hs
+++ b/exercises/hamming/test/Tests.hs
@@ -61,4 +61,14 @@ cases = [ Case { description = "empty strands"
                , strand2     = "AGTG"
                , expected    = Nothing
                }
+        , Case { description = "disallow left empty strand"
+               , strand1     = ""
+               , strand2     = "G"
+               , expected    = Nothing
+               }
+        , Case { description = "disallow right empty strand"
+               , strand1     = "G"
+               , strand2     = ""
+               , expected    = Nothing
+               }
         ]