diff --git a/panic.cabal b/panic.cabal
--- a/panic.cabal
+++ b/panic.cabal
@@ -1,5 +1,5 @@
 name:                panic
-version:             0.3.0.0
+version:             0.4.0.0
 synopsis:            A convenient way to panic.
 description:         A convenient way to panic.
 license:             ISC
diff --git a/src/Panic.hs b/src/Panic.hs
--- a/src/Panic.hs
+++ b/src/Panic.hs
@@ -58,7 +58,7 @@
   where dirty = [| if $gitDirty then " (uncommited files present)" else "" |]
 
 
-instance (Typeable a, PanicComponent a) => Show (Panic a) where
+instance (PanicComponent a) => Show (Panic a) where
   show p = unlines $
     [ "You have encountered a bug in " ++
         panicComponentName comp ++ "'s implementation."