diff --git a/library/Strelka/Core/ResponseBuilder.hs b/library/Strelka/Core/ResponseBuilder.hs
--- a/library/Strelka/Core/ResponseBuilder.hs
+++ b/library/Strelka/Core/ResponseBuilder.hs
@@ -16,7 +16,8 @@
   mappend (ResponseBuilder fn1) (ResponseBuilder fn2) =
     ResponseBuilder (fn2 . fn1)
 
-instance Semigroup ResponseBuilder
+instance Semigroup ResponseBuilder where
+  (<>) = mappend
 
 
 {-|
diff --git a/strelka-core.cabal b/strelka-core.cabal
--- a/strelka-core.cabal
+++ b/strelka-core.cabal
@@ -1,7 +1,7 @@
 name:
   strelka-core
 version:
-  0.3
+  0.3.0.1
 synopsis:
   Core components of "strelka"
 description: